Question

Solve each system of equations by substitution
-3v+3x=12
3v-6x=-21

Answer 1

1) Divide EVERYTHING by 3.

Answer 2

$$-3v+3x=12$$
$$3v-6x=-21$$
$$\frac{1}{3}(-3v+3x)=\frac{1}{3}(12)$$
$$ \frac{1}{3} (3v-6x)=\frac{1}{3}(-21)$$

Answer 3

Dividing by 3 is the same as multiplying by 1/3 right? @overtonka

Answer 4

I really don't know how to do this o.o

Answer 5

The multiplication property of equality allows you to multiply both sides of an equation by the same nonzero number and get an equivalent equation. Have you heard of this property in class?

Answer 6

@overtonka

Answer 7

No I havent

Answer 8

Let me give you an example let's say 3=3, now I multiply both sides by 2 what would I get?

Answer 9

@overtonka

Answer 10

do u want the answer or how to get the answer

Answer 11

To atleast make the question easier divide everything by 3

Answer 12

I tried that