помогите решить уравнения(10y+2*(7y-2))=(5*(4y+3)+3y) (8*(3m-2)-13+(5*(12+3m)+28

Question

помогите решить уравнения(10y+2*(7y-2))=(5*(4y+3)+3y) (8*(3m-2)-13+(5*(12+3m)+28

Answer 1

(10y+2*(7y-2))=(5*(4y+3)+3y)

10у+14у-4=20у+15+3у

 10у+14у-20у-3у=15+4

у=19

 

 (8*(3m-2)-13=(5*(12+3m)+28

24m-16-13=60+15m+28

24m-15m=60+28+13+16

9m=117

m=117/9

m=13

 

 

 

 

 

 

 

 

 

 

 

Answer 2

(10y+2*(7y-2))=(5*(4y+3)+3y)   ==>   10y+14y-4=20y+15+3y  ==> 24y-4=23y+15  ==>

==> 24y-23y=15+4  ==> y=19

 

(8*(3m-2)-13+(5*(12+3m)+28)=0   ==> 24m-16-13+60+15m+28=0  ==>

==>  24m+15m = 16+13-60-28  ==> 39m =16+13-60-28=-59  ==> m=-59/39