Question

Resolva as seguintes equações

a) 4x - 10 = 2x + 2
b) 7 (x - 4 ) = 2x + 4 + x
c) 2x - 1 = -3 - x + 4

Answer 1

a)

4x - 10 = 2x + 2

4x - 2x = 2 + 10

2x = 12

x = 12/2

x = 6

b)

7(x - 4) = 2x + 4 + x

7.x - 7.4 = 3x + 4

7x - 28 = 3x + 4

7x - 3x = 4 + 28

4x = 32

x = 32/4

x = 8

c)

2x - 1 = -3 - x + 4

2x + x = -3 + 1 + 4

3x = 2

x = 2/3