aubrymcilvain aubrymcilvain

24-01-2017
Mathematics

contestada

What is the solution to the equation -4(2x+3)=2x+6-(8x+2)

A) x = –10
B) x = –8
C) x = -5/2
D) x =-4/7

Respuesta :

nailavillarreal nailavillarreal

24-01-2017

The correct answer is B. x=-8

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apologiabiology apologiabiology

24-01-2017

what yo do is distribute first
a(b+c)=ab+ac
so

don't forget to distribute -1

-4(2x+3)=2x+6-1(8x+2)
-4(2x)-4(3)=2x+6-1(8x)-1(2)
-8x-12=2x+6-8x-2
-8x-12=2x-8x+6-2
-8x-12=-6x+4
add 8x to both sides
-12=2x+4
minus 4 both sides
-16=2x
divide both sides b 2
-8=x

B

Answer Link

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