4x+2乘以(20-x)等于62
问题描述:
4x+2乘以(20-x)等于62
答
x=1,x=-13/2
答
4x+40-2x=62
2x=22
x=11
答
4x+2乘以(20-x)等于62
4x+40-2x=62
2x+40=62
2x=62-40
2x=22
x=11