Question

решите уравнение (х-50)+(×+70)+(×+100)=870

Answer 1

(х-50)+(×+70)+(×+100)=870
х-50+х+70+х+100=870
3х=870+50-70-100
3х=750
х=750:3
х=250

Answer 2

x-50+x+70+x+100=870
x+x+x=870+50-70-100
x+x+x=750
x=750:3
x=250