(x-7)/3=8
题目
(x-7)/3=8
答案
两边同时乘以12得:
3(x - 7) - 4(5x + 8) = 12
3x - 21 - 20x - 32 = 12
20x - 3x = -21 - 32 - 12
17x = -65
x = (-65)÷17
x = -65/17
举一反三
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