(1)+2(x-1)-12=9x
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解:解方程,此方程的解为x = -13/7
(1)+2(x-1)-12=9x
1 + 2x - 2 × 1 - 12 = 9x
1 + 2x - 2 - 12 = 9x
2x - 1 - 12 = 9x
9x - 2x = -1 - 12
7x = -13
x = -13 ÷ 7
x = -13 × 1/7
∴x = -13/7
答:此方程的解为x = -13/7
(1)+2(x-1)-12=9x
1 + 2x - 2 × 1 - 12 = 9x
1 + 2x - 2 - 12 = 9x
2x - 1 - 12 = 9x
9x - 2x = -1 - 12
7x = -13
x = -13 ÷ 7
x = -13 × 1/7
∴x = -13/7
答:此方程的解为x = -13/7
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