Question

3) Resolva as expressões algébricas:
a) 2x+4x=36
b) 8y-5y= 27
c) 2(x+2)= -18
d) 7x-40=-9
e) x+x+4
f) 25= 5x

Answer 1

Resposta:

Explicação passo-a-passo:

A) 2x + 4x = 36

2x + 4x = 36

6x = 36

x = 36/6

x = 6

B) 8y - 5y = 27

8y -5y = 27

3y = 27

y = 27/3

y = 9

C) 2 (x + 2) = - 18

2x + 4 = - 18

2x = -18 - 4

2x = -22

x = -22/2

x = -11

D) 7x - 40 = -9

7x - 40 = -9

7x = -9 + 40

7x =  31

x = 31/7

E) x + x + 4

x + x +4

x + x = -4

2x = -4

x = -4/2

x = -2

F) 25 = 5x

25 = 5x

-5x = -25

x = -25/-5

x =5