Question

Resolva
a) 3 • ( 4y - 8 ) = 0

b) 3 ( 2x - 5) = 0

c) 4 ( 4x + 10) = 0

d) 3 ( 6x + 20)

Answer 1

a)3*(4y-8)=0
12y-24=0
12y=0+24
12y=24
y=24/12
y=2

b)3*(2x-5)=0
6x-15=0
6x=0-15
6x=15
x=15/6
x=2,5

c)4*(4x+10)=0
16x+40=0
16x=0-40
16x=-40
x=-40/16
x=-2,5

Answer 2

a)
3 ( 4y - 8 ) = 0
4y - 8 = 0/3
4y = 8
y = 8/4
y = 2

b)
3 ( 2x - 5) = 0
2x - 5 = 0
2x = 5
x = 5/2

c)
4 ( 4x + 10) = 0
4x = - 10
x = - 10/4
x = - 5/2

d)
3 ( 6x + 20) = 0
6x = - 20
x = - 20/6
x = - 10/3

=)