19-2x=100-10x
问题描述:
19-2x=100-10x
答
19-2x=100-10x
10x-2x=100-19
8x=81
x=81/8
19-2x=100-10x
19-2x=100-10x
10x-2x=100-19
8x=81
x=81/8