Question

Решите уравнения
1)0.8(4х+5)=-3,2
2)-2,4(7-9у)=-48

Answer 1

1) 3.2x+4=-3.2
3.2x=-7.2
x=-7.2/3.2
x=-2,25
2) -16.8+21.6y=-48
21.6y=-31.2
y=-1.44
y≈-1.4