Question

Resolva as equações abaixo:
a) 8x=30-2x
b) x + 5 = 8
c)7x + 1 = 5x - 7
d)4x - 18 + 3x = 10

me ajudem! (resolver)​

Answer 1

Resposta:

a) 8x=30-2x

8x+2x=30

10x=30

x=30/10

x=3

b) x + 5 = 8

x=8-5

x=3

c)7x + 1 = 5x - 7

7x-5x=-7-1

2x=-8

x=-8/2

x=-4

d)4x - 18 + 3x = 10

4x-3x=10+18

x=28

Answer 2

Resposta:

a) 8x=30-2x

8x+2x=30

10x=30

x=$\frac{30}{10}$

x=3

b) x + 5 = 8

x=8-5

x=3

c)7x + 1 = 5x - 7

7x-5x=-7-1

2x=-8

x=$\frac{-8}{2}$

x=-4

d)4x - 18 + 3x = 10

7x=10+18

7x=28

x=$\frac{28}{7}$

x=4