1. Jumlahkan (-5× +7) dengan 2×-4 2. Jumlahkan (3a-2) dengan -2a+4 3.kurangkan ×-8 dengan 5×+10 4.kurangkan 9a-8 dengan -2a+4

<p>1. Jumlahkan (-5× +7) dengan 2×-4&nbsp;</p><p>&nbsp; &nbsp; &nbsp;(-5x &nbsp;+ 7) + (3x - 4) = -5x &nbsp;+ 7 + 3x - 4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= -2x + 3</p><p>2. Jumlahkan (3a-2) dengan -2a+4</p><p>&nbsp; &nbsp; &nbsp;(3a - 2) + (-2a + 4) = 3a - 2 &nbsp;- 2a + 4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= a + 2&nbsp;</p><p>3. Kurangkan ×-8 dengan 5×+10&nbsp;</p><p>&nbsp; &nbsp; &nbsp;(x - 8) - (5x + 10) = x - 8 - 5x - 10</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = -4x - 18</p><p>4. Kurangkan 9a-8 dengan -2a+4</p><p>&nbsp; &nbsp; &nbsp;(9a - 8) - (-2a + 4) = 9a - 8 + 2a - 4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 11a - 12&nbsp;</p><p><br>&nbsp;</p>