Question

ПОМОГИТЕ!! Решить уравнение!!!!
5(2у-9)+6у=4(3у-2)-21
7у-4(3у+5)=2-3(4у-9)
5(3-2у)-4(9-у)=3(у+5)

Answer 1

5(2y-9)+6y(3y-2)-21
10y-45+6у=12Y-8-21
16y-12y=8-21+45
4y=16
y=4

Answer 2

7y-12y-20=2-12y+27
7y-12y+12y=20+27+2
7y=49
y=7