Question

Resolva as equações :
A)x+3=3x-6
B)x/2+5=12
C)x/2+x/5=7
D)3x-5=20

Answer 1

Bom dia

A)x+3=3x-6
x-3x=-6-3
-2x=-9
x=-9/2

B)x/2+5=12
x/2=12-5
x/2=7
x=7.2
x=14

C)x/2+x/5=7
2x/10=7
2x=7.10
2x=70
x=70/2
x=35

D)3x-5=20
3x=20+5
x=25/3