Question

5) Resolva as equações:
a) 2x - 2 = 0
b) 7 + 2x = 13
c) 3x + 12 - X= 8
d) 2x + 4 = 9 - 8x
e) 3x + 7 = x-3
f) 2(x - 1) -2(x - 2) = -(x-3)​

Answer 1

A) 2x-2=0

2x=2

x=1

B) 7+2x=13

2x= 13-7

2x= 8

x=4

C) 3x+12-x=8

3x-x=8-12

2x=-4

X=-2

D) 2x+4=9-8x

2x+8x=9-4

10x=5

X=2

E) 3x+7=x-3

3x-x=-3-7

2x=-10

X=-5

F) 2(x-1)-2(x-2)= -(x-3)

2x-2-2x+4=-x+3

2x-2x+x=3+2-4

X=1