1) 640 - x = 100*3y + 35640 - x = 300y + 35x = 640 - 300y - 35x = 290 - 300y
2) a:4 = 450 - 42a/4 = 2a = 4 * 2a = 100
3) b - 280 = 90/b - 280 = 3b = 280 + 3b = 310
Ответ1) x = 290 - 3002) a = 103) b = 310
1) 640 - x = 100*3y + 35
640 - x = 300y + 35
x = 640 - 300y - 35
x = 290 - 300y
2) a:4 = 450 - 42
a/4 = 2
a = 4 * 2
a = 100
3) b - 280 = 90/
b - 280 = 3
b = 280 + 3
b = 310
Ответ
1) x = 290 - 300
2) a = 10
3) b = 310