MarshallBruceMathers MarshallBruceMathers

18-09-2017
Mathematics

contestada

Simplify 12 + 3(2x - 3) + 4.
6x - 3
6x + 7
6x + 13

Respuesta :

musiclover10045 musiclover10045

18-09-2017

12 +3(2x-3) +4

multiply 3 by 2x and by -3

12 +6x -9 +4

6x+7

Answer Link

apologiabiology apologiabiology

18-09-2017

remember the distributive property
a(b+c)=ab+ac
and commutative property
a+b=b+a
so

distribute first

3(2x-3)=3(2x)+3(-3)=6x-9

now we have
12+6x-9+4
move like terms together
6x+12-9+4
add like terms
6x+7

the answer is 6x+7

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