Dalam suatu proyek, upah 4 orang tukang kayu dan 2...

Dalam suatu proyek, upah 4 orang tukang kayu dan 2 orang tukang batu adalah Rp400.000,00 dan upah 3 orang tukang kayu dan seorang tukang batu adalah Rp275.000,00 . Upah 2 orang tukang kayu dan 3 orang tukang batu adalah ....

Rp290.000,00
Rp295.000,00
Rp300.000,00
Rp320.000,00
Rp325.000,00

Jawaban:

$D a r i space s o a l space d i p e r o l e h space p e r s a m a a n space s e b a g a i space b e r i k u t semicolon space 4 k plus 2 b equals 400.000 space space space horizontal ellipsis space left parenthesis 1 right parenthesis space 3 k plus b equals 275.000 space space horizontal ellipsis space left parenthesis 2 right parenthesis space U n t u k space m e n c a r i space u p a h space t u k a n g space k a y u space d a n space t u k a n g space b a t u space m a k a space d a p a t space d i l a k u k a n space d e n g a n space c a r a space m e n g e l i m i n a s i space s a l a h space s a t u space v a r i a b e l space d a r i space p e r s a m a a n space left parenthesis 1 right parenthesis space d a n space left parenthesis 2 right parenthesis comma space m i s a l space v a r i a b e l space b comma space y a i t u colon 4 x plus 2 b equals 400.000 comma 00 space open vertical bar x space 1 space close vertical bar space 4 k plus 2 b equals 400.000 3 k plus b equals 275.000 space space space space space space space space space open vertical bar x space 2 space close vertical bar space 6 k plus 2 b equals 500.000 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space minus 2 k equals 150.000 left right arrow k equals 75.000 S e l a n j u t n y a space s u b s t i t u s i k a n space n i l a i space k space k e space s a l a h space s a t u space p e r s a m a a n comma space m i s a l space p e r s a m a a n space left parenthesis 2 right parenthesis comma space m a k a space d i p e r o l e h colon space 3 left parenthesis 75.000 right parenthesis plus b equals 275.000 space b equals 50.000 space S e h i n g g a space u p a h space 2 space o r a n g space t u k a n g space k a y u space d a n space 3 space o r a n g space t u k a n g space b a t u space a d a l a h colon space 2 k plus 3 b equals 2 left parenthesis 75.000 right parenthesis plus 3 left parenthesis 50.000 right parenthesis space equals 150.000 plus 150.000 space equals 300.000$

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