Question

1- Resolva as equações:

a-18y=32
b-6x-4=2x-8
c-8x-4=2x-6
d-7x-8=2x-4
e-10x-4=2x+5
f- 20x-8=10-6
g- 10-5=5x+4
h- 20x-6=2x-8
i- 15x-10=3x+15
j- 20x-6=2x-8
k- 13x-4=2x-8

Urgrente por favor!!!

Answer 1

a-18y=32
y = 32:18 = 16:9

b-6x-4=2x-8
6x - 2x = - 8 + 4
4x = - 4
x = - 4 : 4
x = -1

c-8x-4=2x-6
8x - 2x = 4 - 6
6x = - 2
x = - 1 / 3

d-7x-8=2x-4
7x - 2x = 8 - 4
5x = 4
x = 4 : 5

e-10x-4=2x+5
10x - 2x = 5 + 4
8x = 1
x = 1 / 8

f- 20x-8=10-6
20x = 4 + 8
x = 12 / 20
x = 3 / 5

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

h- 20x-6=2x-8
20x - 2x = 6 - 8
18x = - 2
x = - 2 / 18
x = - 1 / 9

i- 15x-10=3x+15
15x - 3x = 15 + 10
12x = 25
x = 25 / 12

j- 20x-6=2x-8
20x - 2x = 6 - 8
18x = - 2
x = - 1 / 9

k- 13x-4=2x-8
13x - 2x = 4 - 8
11x = - 4
x = - 4 / 11