Question

3. Resolva as equações a seguir.
a) 2x + 8 = 20
b) 4 − 5x + 2x = −15
c) 2x + 3x − 4 + 3 − 4x = 8 − 3
d) 3x + 5 = 19

Answer 1

Resposta:

a) 8-20=-2x

-16=-2x

2x=16

x=16/2

x=8

b)-3x=-15-4

3x=15+4

3x=19

x=19/3

c)x=8-3+1

x=7

d)3x=19-5

3x=14

x=14/3