Question

Помогите плиз номер 8 там уравнении

Answer 1

x+240=1260:3
x+240=420
x=420-240
x=180

x+720=1260
x=1260-720
x=540

x+240=3780
x=3780-240
x=3540

Answer 2

(x+240)*3=1260
x+240=1260:3
x+240=420
x=420-240
x=180.