Question

Resolva as equações

(A) 4x-6=22
(B)9-×=2×
(C)8+4×=6×-4
(D) 3×+1=×+9
(E)4×-11=7-2×

Answer 1

a)
4x-6=22
4x=22+6
4x=28
x=28/4
x=7

b)
9-x=2x
-x-2x=-9  (multiplica por -1)
x+2x=9
3x=9
x=9/3
x=3

c)
8+4x=6x-4
4x-6x=-4-8
-2x=-12(multiplica por -1)
2x=12
x=12/2
x=6

d)
3x+1=x+9
3x-x=9-1
2x=8
x=8/2
x=4

e)
4x-11=7-2x
4x+2x=7+11
6x=18
x=18/6
x=3