Question

alguem me ajuda resolver essas questoens
a) 2(x - 5) + 4(x - 1) = 4




b) 3(x + 10) - 2(x - 5) = 0





c) 2( x - 1) - 7 = 16







d) 7( x - 1) - 2(x - 5) = x - 5

Answer 1

Oie, Td Bom?!

a)

2(x - 5) + 4(x - 1) = 4

2x - 10 + 4x - 4 = 4

6x - 14 = 4

6x = 4 + 14

6x = 18

x = 18/6

x = 3

b)

3(x + 10) - 2(x - 5) = 0

3x + 30 - 2x + 10 = 0

x + 40 = 0

x = - 40

c)

2(x - 1) - 7 = 16

2x - 2 - 7 = 16

2x - 9 = 16

2x = 16 + 9

2x = 25

x = 25/2

d)

7(x - 1) - 2(x - 5) = x - 5

7x - 7 - 2x + 10 = x - 5

5x + 3 = x - 5

5x - x = - 5 - 3

4x = - 8

x = - 8/4

x = - 2

Att. Makaveli1996