Question

11.Resolva as equações:
A)
B)
C)
D)
E)
F)
G)

Answer 1

a) 2x+4=12. d)5x-7=7x-9
2x=12-4. -2x=-9+7
2x=8. -2x=
x=8/2
x=4

b)3x-2=10
3x=10+2
3x=12
x=12/3
x=4

c)3x-7=x+5
2x=5+7
2x=12
x=12/2
x=6