1) 2a + 123a + 97 = 472125a + 97 = 472125a = 375a = 375 / 125a = 3
2) 17x - x + 5x - 19 = 170(17 - 1)x + 5x - 19 = 17016x + 5x - 19 = 17021x - 19 = 17021x = 189x = 189 / 21x = 9
3) 73y - y - 22y + 40 = 790(73 - 1 - 22)y + 40 = 79050y + 40 = 79050y = 750y = 750 / 50y = 15
Ответ: a = 3, x = 9, y = 15.
1) 2a + 123a + 97 = 472
125a + 97 = 472
125a = 375
a = 375 / 125
a = 3
2) 17x - x + 5x - 19 = 170
(17 - 1)x + 5x - 19 = 170
16x + 5x - 19 = 170
21x - 19 = 170
21x = 189
x = 189 / 21
x = 9
3) 73y - y - 22y + 40 = 790
(73 - 1 - 22)y + 40 = 790
50y + 40 = 790
50y = 750
y = 750 / 50
y = 15
Ответ: a = 3, x = 9, y = 15.