7x+2x=4.5
问题描述:
7x+2x=4.5
答
0.5
答
x=0.5
答
9x=4.5 x=0.5
答
9X=4.5
X=0.5
答
7x + 2x = 4.5
(7 + 2)x = 4.5
9x = 4.5
x = 4.5÷9
x= 0.5
答
X=0.5