7(X-3)=43-X

问题描述:

7(X-3)=43-X
请各位把详细的解方程经过写出来,如:
0.9x+4.4=7.1
0.9x=7.1-4.4
0.9x=2.7
x=2.7/0.9
x=3

7(X-3)=43-X
7X - 21 = 43 - X
7X + X = 43 + 21
8X = 64
X = 8