Question

solve this system of linear equations. Separate the x- and y-values with a comma.

6x + 20y = -62
3x - 9y = -12

Answer 1

are you familiar with substitution and elimination?

Answer 2

yes, but this one confuses me because they're all different x and y values..

Answer 3

alright lets find x first pick a equation to find x in

Answer 4

lets do the second one cuz it's a bit easier

Answer 5

3x-9(0)=-12

Answer 6

can you solve that for me?

Answer 7

x=-4 ?

Answer 8

yes do you understand where the 0 came from

Answer 9

no I was wondering about that..

Answer 10

whenever we do substitution we substitute whatever value we want to find in this case x we would substitute 0 in for y if we were finding y we would substitute 0 in for x

Answer 11

now we take x=-4 and substitute that into an equation

Answer 12

-12 - 9y = -12 ?