1. 9x+7=11x-13
2. 2(3x-5)=4(2x+2)
3. 4(x-3)>2(3x+5)
4. (2x-4)/3<(3x+5)/4
5. (x-2)/3+(2x+1)/2
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9x+7 = 11x-13
⇔ 9x+7-7 = 11x-13-7
⇔ 9x = 11x-20
⇔ 9x - 11x = -20
⇔ -2x = -20
⇔ -2x ÷ -2 = -20 ÷ -2
⇔ x = 10
Himpunan penyelesaian = {x / x = 10, x ∈ R}
untuk nomer 2
(dikalikan ntara yang dalam kurung sama yang tidak)
2(3x-5)=4(2x+2)
⇔ 6x - 10 = 8x + 8
⇔ 6x - 10 + 10 = 8x + 8 + 10
⇔ 6x = 8x + 18
⇔ 6x - 8x = 18
⇔ -2x = 18
⇔ -2x ÷ -2 = 18 ÷ -2
⇔ x = -9