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<p>a.</p><ul><li>Menyederhanakan senilai</li></ul><p>1/2x - 3/4y = 7/4 &nbsp;|×4</p><p>2/5x - 1/3y = 7/3 &nbsp;|×15</p><p>_______________________</p><ul><li>Eleminasi</li></ul><p>=&gt;2x - 3y = 7 &nbsp; |×3</p><p>&nbsp; &nbsp;6x - 5y = 35 |×1</p><p>___________________</p><p>&nbsp; &nbsp;6x - 9y = 21</p><p>&nbsp; &nbsp;6x - 5y = 35</p><p>_____________________</p><p>&nbsp; &nbsp; &nbsp; &nbsp; -4y = -14</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;y = -14/-4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; y = 7/2</p><p>&nbsp;</p><ul><li>Substitusi</li></ul><p>2x - 3y = 7</p><p>2x - 3(7/2) = 7</p><p>2x - 21/2 = 7</p><p>2x = 7 + 21/2</p><p>2x = 35/2</p><p>x = 35/4</p><p>&nbsp;</p><p>HP = { 35/4 , 7/2 }</p><p>&nbsp;</p><p>b. 1/x - 3/y = 1/10</p><p>&nbsp; &nbsp; &nbsp;1/x = 1/10 + 3/y</p><ul><li>Substitusi</li></ul><p>2/x - 1/y = 6/5</p><p>2(1/10 + 3/y) -1/y = 6/5</p><p>2/10 + 6/y - 1/y = 6/5</p><p>2/10 + 5/y = 6/5</p><p>5/y = 6/5 - 2/10</p><p>5/y = 1</p><p>y = 5</p><ul><li>Substitusi y=5</li></ul><p>1/x - 3/5 = 1/10</p><p>1/x = 1/10 + 3/5</p><p>1/x = 1/10 + 6/10</p><p>1/x = 7/10</p><p>x = 10/7</p><p>&nbsp;</p><p>&nbsp;</p><p>HP = { 10/7 , 5 }</p>