А.
x+3*25=87;
x + 75 = 87
x = 87 - 75
x = 12
О.
8*17-x=107;
136 - x = 107
x = 136 - 107
x = 29
К.
555:5-x=74;
111 - x = 74
x = 111 - 74
x = 37
П.
2x+87=93;
2x = 93 - 67
2x = 26
x = 26 : 2
x = 13
М.
3*(35-x)=63
35 - x = 63 : 3
35 - x = 21
x = 35 - 21
x = 14
С.
(120-x):13=8
120 - x = 8 * 13
120 - x = 104
x = 120 - 104
x = 16
А.
x+3*25=87;
x + 75 = 87
x = 87 - 75
x = 12
О.
8*17-x=107;
136 - x = 107
x = 136 - 107
x = 29
К.
555:5-x=74;
111 - x = 74
x = 111 - 74
x = 37
П.
2x+87=93;
2x = 93 - 67
2x = 26
x = 26 : 2
x = 13
М.
3*(35-x)=63
35 - x = 63 : 3
35 - x = 21
x = 35 - 21
x = 14
С.
(120-x):13=8
120 - x = 8 * 13
120 - x = 104
x = 120 - 104
x = 16