Resposta :
Resposta:
a)x+7=8
x=7-8
x=1
b)-7x+14=7x
-7x-7x=-14
-14x=-14.(-1)
x=1
c)-5-4=-36x
-9=-36x
-36x=-9
x=1/4
d)20x+8+4=-4x
20x+12=-4x
24x=-12
x=-1/2
e)6x+6x=6
12x=6
x=1/2
f)7x=-28+49
7x=21
x=3
g)15x+12x=3
27x=3
x=1/9
Resposta:a)x+7=8
x=7-8
x=1
b)-7x+14=7x
-7x-7x=-14
-14x=-14.(-1)
x=1
c)-5-4=-36x
-9=-36x
-36x=-9
x=1/4
d)20x+8+4=-4x
20x+12=-4x
24x=-12
x=-1/2
e)6x+6x=6
12x=6
x=1/2
f)7x=-28+49
7x=21
x=3
g)15x+12x=3
27x=3
x=1/9
Explicação passo a passo: