Question

5m-(2m+8)=16

7(x-2)8(x-2)

3b-3=3(7-6)

19-(2n+3)=2(n+3) +n

7(5x-2)=6(6x-1)

-3y+2(-3y+5)=-4(2y-3)-1

2(2n-4)-3a=-1

5x-2(2x+6)=-15

-4y+3(y-8)=7(2y-4)-11

4(3n-2)+9n=13

12-3(y-5)=21

-5c+4(2+2c)=-1

5(n-1)+16(2n+3)=3(2n-7)-n

Answer 1

LA TERCERA:


3b-3=3(7-6)
3b-3=3 (1)
3b-3= 3
3b= 3 + 3 
3b = 6
b = 6/3
b= 2