Question

a) 10x9x+2x=2-3x
b) 4x-4-5x=-6+90
f) 13+4(2x-1)=5(x+2)
g) 4(x+5)+3(x+5)=21​​
preciso de ajuda nessas, porfavor​

Answer 1

Letra a):

10x + 9x + 2x = 2 - 3x

24x = 2

x = 24/2

x = 12

Letra b):

4x - 4 - 5x = - 6 + 90

-x = - 6 + 94

- x = 88

x = - 88

Letra f):

13 + 4 . (2x + 1) = 5 . (x + 2)

13 + 4x + 4 = 5x + 10

- x = - 7

x = 7

Letra g):

4 . (x + 5) + 3 . (x + 5) = 21

4x + 20 + 3x + 15 = 21

7x = -14

x = -14/7

x = -2