Question

10x-8=3×+6 e 5+2(3y-1)=7y+6 qual o valor de x-y

Answer 1

10x-8=3x+6
10x-3x=6+8
7x=14
x=14/7
x=7


5+2(3y-1)=7y+6 
5+6y-2=7y+6 
6y-7y=6+2-5 
-y=8-5 
-y=3 
y=-3