(3x- 12)除以1.5=x+12怎么解
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解:解方程, 此方程的解为x = 20
(3x- 12)除以1.5 = x + 12
3x - 12 = (x + 12)× 1.5
3x - 12 = 1.5x + 18
3x - 1.5x = 18 + 12
(30/10)x - [(1×10+5)/10]x = 30
(30/10)x - (15/10)x = 30
(15/10)x = 30
(3/2)x = 30
x = 30 ÷ 3/2
x = 30 × 2/3
x = 10 × 2
∴x = 20
答:此方程的解为x = 20
(3x- 12)除以1.5 = x + 12
3x - 12 = (x + 12)× 1.5
3x - 12 = 1.5x + 18
3x - 1.5x = 18 + 12
(30/10)x - [(1×10+5)/10]x = 30
(30/10)x - (15/10)x = 30
(15/10)x = 30
(3/2)x = 30
x = 30 ÷ 3/2
x = 30 × 2/3
x = 10 × 2
∴x = 20
答:此方程的解为x = 20
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