M(y)=(13y−15)−(9+6y) и N(y)=-3yN(y)=−3y
Решите

5y-(7-2у)-(4y+8)=2y

5у-7+2у-4у-8=2у

3у-2у=15

у=15

6y(13y-9)-13y(6y-1)=24y-13

78у^2-54y-78y^2+13y=24y-13

-54y+13y-24y=-13

-65y=-13

y=13^65

y=0.2

(2x-3)^2-(2x+1)(2x-5)=3x-14

4x^2-12x+9-(4x^2+2x-10x-5)=3x-14

4x^2-12x+9-4x^2+8x+5=3x-14

-7x=-14-14

-7x=-28

x=28:7

х=4