Question

Qual o valor de x?

a) 3 (x -1) = 8

b) 5 (x -2) = 2 (x + 3)

c) 3x - 6 = 18

d) 8x - 2 = 30

e) 9x - 4 = 50

f) x/2 + 3 = 1/3

g) x + 4 / 5 = 2

h) 3 x + 3 = 1 / 4

i) 2x / 2 - x/5 = 3

Preciso pra amanhã a tarde!!!

Answer 1

Bom dia

a) 3 (x -1) = 8
3x-3=8
3x=8+3
3x=11
x=11/3

b) 5 (x -2) = 2 (x + 3)
5x-10=2x+6
5x-2x=6+10
3x=16
x=16/3

c) 3x - 6 = 18
3x=18+6
3x=24
x=24/3
x=8

d) 8x - 2 = 30
8x=30+2
x=32/8
x=4

e) 9x - 4 = 50
9x=54
x=54/9
x=6

f) x/2 + 3 = 1/3
x/2=1/3-3
x/2=1
x=1.2
x=2

g) x + 4 / 5 = 2
x=2-4/5
x=1/-20

h) 3 x + 3 = 1 / 4
3x=1/4-3
3x=-2/4
x=-2/4/3/1
x=-2/12

i) 2x / 2 - x/5 = 3
2x-x=3.2.5
x=30