0.3(8-3y) = 3.2 - 0.8(y-7)
2.4 - 0.9y = 3.2 - 0.8y + 5.62.4 - 0.9y = 8.8 - 0.8y
Приравняем коэффициенты y:
-0.9y + 0.8y = 8.8 - 2.40.1y = 6.4y = 6.4 / 0.1y = 64
Ответ: y = 64.
0.3(8-3y) = 3.2 - 0.8(y-7)
2.4 - 0.9y = 3.2 - 0.8y + 5.6
2.4 - 0.9y = 8.8 - 0.8y
Приравняем коэффициенты y:
-0.9y + 0.8y = 8.8 - 2.4
0.1y = 6.4
y = 6.4 / 0.1
y = 64
Ответ: y = 64.