Question

Resolva as equações:
A)x+7=20
B)2-1=-10
C)3-x=15
D)x=12
2
E)x-1=12+11
F)5x-5=2 x+10
G)3x+5=14

Answer 1

Espero ter ajudado.
No entendi a D.

Answer 2

a) x=20-7

×=13,,

b)2x=-10+1

2×=-9,,

c)-×=15-3

-×=12(-1)

×=-12,,

d)?????

e)×=12+11+1

×=24,,

f)5×-2×=+10+5

3×=+15

×=15/3

×=5,,

g)3×=14-5

3×=11

×=11/3

×=3.666...