Question

resolva as equações abaixo:
A)X-9=31
B)2x+4=16
C)3x+9=x+12
D)4W+7=2W-10

Answer 1

B: 2x+4=16
2x=16-4
2x=12
x=12/2
x=6

Answer 2

x=31+9
x=40




2x=16-4
2x=12
x=12
2
x=6




3x-x=12-9
2x=3
x=3
2



4w-2w=-10-7
2w=-17
w=-17
-2