Question

Resolva as equações:

a) 2x + 2 = 12

b) 5x + 3 =2x - 9

Answer 1

a)2x+2=12

2x=12-2

2x=10

x=10/2

x=5

b)5x+3=2x-9

5x-2x=-9-3

3x=6

x=6/3

x=2

Answer 2

Vamos lá

a) 2x + 2 = 12

2x + 2 - 2 = 12 - 2

2x = 10

x = 10/2 = 5

b) 5x + 3 = 2x - 9

5x - 2x = - 9 - 3

3x = -12

x = -12/3 = -4