Question

gente me ajudem pfv

1) resolva as equações

a) 5(3-x)+4x=18
b) 9x-3(2x+2)=15
c) 4(x+10)=2(x-5)
d) 7(x-1)-2(x-5=x-5
e) x+x=x-1
6 4 1

f) x-2+2x=5x
3 1 2

Answer 1

Resposta:

a) x= -3

b) x=7

c) x= -25

d) x=-2

e) x=-1

f)x-1

Explicação passo-a-passo:

a) 5(3-x)+4x=18

15-5x+4x=18

-5x+4x=18-15

-x=3 (-1)

x= -3

b) 9x-3(2x+2)=15

9x-6x-6=15

3x=15+6

3x=21

x=21/3

x=7

c) 4(x+10)=2(x-5)

4x+40=2x-10

4x-2x=-40-10

2x=-50

x=-50/2

x= -25

d) 7(x-1)-2(x-5)=x-5

7x-7-2x+10 = x-5

7x-2x-x=7-10-5

7x-3x=7-15

4x=-8

x=-8/4

x=-2

e) x+x=x-1

2x=x-1

2x-x=-1

x=-1

f) x-2+2x=5x

x+2x-5x=2

3x-5x=2

-2x=2 (-1)

x=-2/2

x-1