Question

Resolva as equações abaixo.

a) 10x=20+9x

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

c) 5-x-20=5×-10-7x

d) 6(x+3)-2 (x-5)=20

Answer 1

a) 10x=20+9x
10x-9x= 20
x= 20

b)2x+5-x=5-3x
2x-x+3x= 5-5
4x= 0
x= 0/4
x= 0

c) 5-x-20=5×-10-7x
-x-5x+7x= -10-5+20
x= 5

d) 6(x+3)-2 (x-5)=20
6x+18-2x+10= 20
6x-2x= 20 -10 -18
4x= -8
x= -8/4
x= -2

Answer 2

A)

10x = 20 + 9x
10x - 9x = 20
x = 20

B)

2x + 5 - x = 5 - 3x
2x - x + 3x = 5 - 5
x + 3x = 0
4x = 0
x = 0 / 4
x = 0

C)

5 - x - 20 = 5x - 10 - 7x
- x - 5x + 7x = - 10 + 20 - 5
- 6x + 7x = 10 - 5
x = 5

D)

6 ( x + 3 ) - 2 ( x - 5 ) = 20
6x + 18 - 2x + 10 = 20
6x - 2x = 20 - 10 - 18
4x = 10 - 18
4x = - 8
x = - 8 / 4
x = - 2

- Espero Ter Ajudado E Bons Estudos !!