Question

Simplifique as expressões algébricas.
a) 4(x - 1) + 3(x + 1)
b) -2(2x - 4) + 5(-2x - 10)
c) 2/5(x - 0.2) - 1/2(3x-4/25)​

Answer 1

a)

4x - 4 + 3x + 3

4x + 3x = 4 - 3

7x = 1

x = 1/7

b)

- 4x + 8 - 10x - 50

- 14x = 50 - 8

-14x = 42

x = - 42/14

x = - 3

c)

(2x - 0,4)/5 - 12x/50

x = 1/2