Question

реши уравнение
75+(680:a)×15=135

Answer 1

75+(680:a)*15=135
(680:a)*15=135-75
(680:a)*15=60
(680:а)=60/15
680/a=4
a=680/4
a=170

Answer 2

(680 : а) * 15 = 135 - 75
680 : а = 60 : 15
а = 4 * 680
а = 2720