Question

Resolva as equações :
2 ( x + 3 ) = 30

8-2(x+5) = 5

3 (2x+4) = 4 (x+6

Answer 1

2(x+3)=30
x+3=15 
x=15-3
x=12

8-2(x+5)=5
8-2x-10=5
-2-2x=5
-2x=5+2
-2x=7
x=-7/2

3 (2x+4) = 4 (x+6)
6x+12=24-12
6x-4x=24-12
2x=12