Question

Resolvas as equações:
a) 5x + 36 = 16

b) 3 - x = 2

c) 2x + 5 = 20

d) x + 9 = 1

e) 5 = x + 3

Answer 1

a) 5x + 36 = 16
5x=16-46
x=-30/5=-6

b) 3 - x = 2
-x=2-3 (×-1)
x=1

c) 2x + 5 = 20
2x=20-5
x=15/2=7,5

d) x + 9 = 1
x=1-9=-8

e) 5 = x + 3
-x=3-5 (×-1)
x=2