С проверкой 1)(х+240)*3=1260 2)2+(240*3)=1260 3)х+240=1260*3 Решить уравнение с ПРОВЕРКОЙ.
х+240 = 1260/3х+240 = 420х = 420-240х = 180(180+240)*3 = 12603) х+240 = 3780х = 3780-240х = 35403540+240 = 1260*3
Х+240 = 1260/3 х+240 = 420 х = 420-240 х = 180 (180+240)*3 = 1260 3) х+240 = 3780 х = 3780-240 х = 3540 3540+240 = 1260*3