Решите уравнение 5(1-2y)=7-4(3y+1)

Question

Решите уравнение 5(1-2y)=7-4(3y+1)

Answer 1

5-10у=7-12у-4
5-10у=3-12у
-10у-12у=3-5
2у=-2
у=-1

Answer 2

5(1-2у) = 7-4(3у+1)
5 - 10у = 7 - 12у - 4
-10у+12у = 7-4-5
2у = -2
у = -2:2
у = -1
-----------
5(1-2*(-1) = 7-4(3*(-1)+1)
5*3 = 7+8
15 = 15