Question

Resolva as equações. a)11x+7=-6 b)3x+1=2x c)1+2x=8-5x d)5x-1=2-x e)5+x=-7+7x f)7x+1=5x-7 g)5x-91=4x-77 h)5+3y=-1+4y

Answer 1

a)11x+7=-6
11x=-6-7
x=13/11

b)3x+1=2x 
2x-3x=1
-x=1   x(-1)
x=-1

c)1+2x=8-5x
2x+5x=8-1
7x=7
x=1

d)5x-1=2-x
5x+x=2+1
6x=3
x=3/6
x=1/2

e)5+x=-7+7x
7x-x=5+7
6x=12
x=2

f)7x+1=5x-7 
7x-5x=-7-1
2x=-6
x=-3

g)5x-91=4x-77
5x-4x=-77+91
x=14

h)5+3y=-1+4y
4y-3y=5+1
y=6