2 × X + 460 = 600 x - (120+260)=240

2*х+460=600;

2х=600-460;

2х=140;

х=140:2;

х=70;

ответ: 70;

х-(120+260)=240;

х-380=240;

х=240+380;

х=620;

ответ: 620

2*x+460=600
2x=600-460
2x=140
x=140:2
x=70
—————
x-(120+260)=240
x-380=240
x=240+380
x=620