1) -20*(x-13) = -220-20x + 260 = -220-20x = -220 - 260-20x = -480x = 480 / 20x = 24
2) (30-7x)*8 = 352240 - 56x = 352-56x = 352 - 240-56x = 112x = 112 / -56x = -2
3) 5y - 3 = 1/125y = 1/12 + 35y = 3.25y = 3.25 / 5y = 0.65
Пожалуйста!
1) -20*(x-13) = -220
-20x + 260 = -220
-20x = -220 - 260
-20x = -480
x = 480 / 20
x = 24
2) (30-7x)*8 = 352
240 - 56x = 352
-56x = 352 - 240
-56x = 112
x = 112 / -56
x = -2
3) 5y - 3 = 1/12
5y = 1/12 + 3
5y = 3.25
y = 3.25 / 5
y = 0.65
Пожалуйста!