Question

初一求两个x的值 x+(x+10)+[180-(x+70)]=180x=?x+(x+20)+(x-10)+70+x=54

Answer 1

x+(x+10)+(180-x-70)=180 x+x+10+180-x-70=180 x-60=0 x=60

x+x+20+x-10+70+x=540 4x+80=540 4x=460 x=115