Question

Alguém me ajuda nessas questões?

1) Resolva as seguintes equações; sendo U = Q:

a) 7(X - 5) = 3(X + 1)

b) 3 (X - 2) = 4(- X + 3)

c) 2 (X + 1) - (X - 1) = 0

d) 5(X + 1) - 3(X + 2) = 0

e) 13 + 4(2X - 1) = 5(X + 2)

f) 4(X + 5) + 3(X + 5) = 21

g) 2(X + 5) - 3(5 - X) - 10

h) 8(X - 1) = 8 - 4 (2X - 3)

2)

a) 5x - 7 = 1 + x
2 2

b) 2x - 1 = x - x - 1
3 5

c) x + 3x - 2 = x - 3
4 2 2

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

e) 3(x - 5) + 2x = 7
6 4

f) x - 2 = 5(x - 3)
5 4

3) Resolva as seguintes equações:

a) 5x - 10 = x + 1
2

b) 8x - 1 - 2x = 3
2

c) 2x - 7 = x + 2
5 3

d) 5x = 2x + x - 2
2 3

e) x - 3 - 2x - 1 = 5
4 5

f) x - 1 + x - 3 = 6
2 3

Answer 1

5x - 10 = x + 1
5x-x=1+10
4x=11
x=11/4

b) 8x - 1 - 2x = 3
8x-2x=3+1
6x=4
x=4/6
x=2/3

c) 2x - 7 = x + 2
2x-x=2+7
x=9

d) 5x = 2x + x - 2
5x-2x-x=-2
2x=-2
x=-1

e) x - 3 - 2x - 1 = 5
x-2x=5+3+1
-x=9 .(-1)
x=9

f) x - 1 + x - 3 = 6
x+x=6+1+3
2x=10
x=10/2
x=5