Question

19-x=100-10x这个方程怎么解?我要过程

Answer 1

19-X=100-10X10X-X=100-199x=819Xx9÷9=89÷9X=9 记住等于号要对其，小x 代表乘号

Answer 2

19-x=100-10x10x-x=100-199x=81x=9

Answer 3

19-x=100-10x19=100-10x+x19=100-9x9x=100-199x=81x=9

Answer 4

19-x=100-10x-x+10x=100-199x=81x=9