(120+8x)-(15-x)*4=72怎么解
问题描述:
(120+8x)-(15-x)*4=72怎么解
答
(120 + 8x) - (15 - x)×4 = 72
120 + 8x - 60 + 4x = 72
8x + 4x = 72 - 120 + 60
12x = 12
x = 12÷12
x = 1