Misalkan:

<img align="middle" alt="begin mathsize 14px style x subscript 1 equals text umur ayah sekarang end text
y subscript 1 equals text umur ibu sekarang end text end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«msub»«mi»x«/mi»«mn»1«/mn»«/msub»«mo»=«/mo»«mtext»umur§#160;ayah§#160;sekarang«/mtext»«mspace linebreak=¨newline¨/»«msub»«mi»y«/mi»«mn»1«/mn»«/msub»«mo»=«/mo»«mtext»umur§#160;ibu§#160;sekarang«/mtext»«/mrow»«/mstyle»«/math»" height="40" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -21px;" width="172" />&nbsp;

Diketahui:&nbsp;

<img align="middle" alt="begin mathsize 14px style y subscript 1 equals 35 space text tahun end text
x subscript 1 equals 5 space plus y subscript 1 end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«msub»«mi»y«/mi»«mn»1«/mn»«/msub»«mo»=«/mo»«mn»35«/mn»«mo»§#160;«/mo»«mtext»tahun«/mtext»«mspace linebreak=¨newline¨/»«msub»«mi»x«/mi»«mn»1«/mn»«/msub»«mo»=«/mo»«mn»5«/mn»«mo»§#160;«/mo»«mo»+«/mo»«msub»«mi»y«/mi»«mn»1«/mn»«/msub»«/mstyle»«/math»" height="40" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -21px;" width="92" />&nbsp;

Umur ayah sekarang

<img align="middle" alt="begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell x subscript 1 end cell equals cell 5 plus y subscript 1 end cell row blank equals cell 5 plus 35 end cell row blank equals cell 40 space text tahun end text end cell end table end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mtable columnspacing=¨0px¨ columnalign=¨right center left¨»«mtr»«mtd»«msub»«mi»x«/mi»«mn»1«/mn»«/msub»«/mtd»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»5«/mn»«mo»+«/mo»«msub»«mi»y«/mi»«mn»1«/mn»«/msub»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»5«/mn»«mo»+«/mo»«mn»35«/mn»«/mtd»«/mtr»«mtr»«mtd/»«mtd»«mo»=«/mo»«/mtd»«mtd»«mn»40«/mn»«mo»§#160;«/mo»«mtext»tahun«/mtext»«/mtd»«/mtr»«/mtable»«/mstyle»«/math»" height="55" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -29px;" width="94" />&nbsp;&nbsp;

Jadi, umur ayah sekarang adalah&nbsp;<img align="middle" alt="begin mathsize 14px style 40 space text tahun end text end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mn»40«/mn»«mo»§#160;«/mo»«mtext»tahun«/mtext»«/mrow»«/mstyle»«/math»" height="11" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -1px;" width="62" />&nbsp;

Umur ayah lebih tua 5 tahun daripada umur ibu. Umur ibu sekarang adalah 35 tahun. Tentukanlah:

a. umur ayah sekarang;

matematika

bahasa indonesia

ipa terpadu

fisika

biologi

bahasa inggris

geografi

sosiologi

sejarah

kimia

ekonomi

Umur ayah lebih tua 5 tahun daripada umur ibu. Umu...

Jawaban: