Question

1) Resolva as equações abaixo:
a )- 6x + 80 = - 3x + 110 d) 2x + 7 – x = 21 – 6x

b) 5x – 80 = 8 – 3x e) 2. (8 – x) = 2 – (3x – 6)

c ) 10 – 2( x + 1) = -3 x + 27 f) 7x – 3. ( x - 4) = 3x + 12

Answer 1

Resposta:

a) x = 10

b) x = 11

c) x = 19

d) x = 2

e) x = -8

f) 0

Explicação passo a passo:

a) -6x+80=-3x+110

-6x+3x=110-80

-3x=30 (-1)

3x=30

x=30/3   x=10

b) 5x-80=8-3x

5x+3x=8+80

8x=88

x=88/8   x=11

c) 10-2(x+1)=-3x+27

10-2x-2=-3x+27

-2x+3x=27-10+2

x=19

d) 2x+7-x=21-6x

2x-x+6x=21-7

7x=14

x=14/7   x=2

e) 2.(8-x)=2-(3x-6)

16-2x-16=-3x+8-16

-2x+3x=8-16

x=-8

f) 7x-3.( x-4)=3x+12

7x-3x+12=3x+12

7x-3x-3x=12-12

x=0