Question

1)Resolva as equações abaixo.

a) 2(x – 3) + 4(2x + 1) = 8 – 5(x – 4)

b) y + [y – (2y – 3 ) – 5] + 2y = –8 – 2(y ​

Answer 1

1) a)

2(x - 3) + 4(2x + 1) = 8 - 5(x - 4)

2x - 6 + 8x + 4 = 8 - 5x + 20

2x + 8x + 5x = 8 + 20 + 6 - 4

15x = 30

x = 30/15

x = 2

b)

y + [y - (2y - 3) - 5] + 2y = -8 - 2y

y + [y -2y + 3 - 5] + 2y = -8 - 2y

y + [-y - 2] + 2y = -8 - 2y

y - y - 2 + 2y = -8 - 2y

2y + 2y = -8 + 2

4y = -6

y = -6/4

y = -3/2