PLEASE HELP ME

Question

PLEASE HELP ME

anonymous · Answer

attachment

mathstudent55 · Answer

Do you know how the substitution method works?

catlover5925 · Answer

oks o for substitution on one equation you would solve for Y, then plug it into the other equation to get X

catlover5925 · Answer

do you want me to work through this with you??

uri · Answer

Solve for x first
cancel out  -6y +6y

mathstudent55 · Answer

Yes, that's correct. We can do it together, but before we even start the substitution method, we can simplify both equations.
Notice that both equations are divisible by 6, so let's start by dividing both sides of both equations by 6 to get smaller numbers.

anonymous · Answer

4?

mathstudent55 · Answer

@uri The problem specifies substitution. You are suggesting the addition method.

mathstudent55 · Answer

Here is the system of equations.

$36x - 6y = 144$
$72x + 6y = 720$

Let's divide both sides of both equations by 6.

uri · Answer

Opps. Didn't read it eh. Sorryz. :3

mathstudent55 · Answer

$6x - y = 24$
$12x + y = 120$

@lillyflowerrr  Do you follow so far? All I did was divide both equations by 6 to get smaller numbers to work with.

mathstudent55 · Answer

@uri No problem. We are all trying to help.

anonymous · Answer

4?

mathstudent55 · Answer

What is 4?

anonymous · Answer

the answer

mathstudent55 · Answer

I don't know. I haven't gotten there yet.

mathstudent55 · Answer

To use the substitution method, now you solve the second equation for y.
Can you do that? What do you get?

anonymous · Answer

nevermind thanks though i got bumped out

mathstudent55 · Answer

Sorry I couldn't answer any more, but I lost my connection.
1) Solve second equation for y:
$y = -12x + 120$
2) Substitute into first equation:
$6x - (-12x + 120) = 24$
$6x + 12x - 120 = 24$
$18x = 144$
$x = 8$
Now substitute 8 for x in the first equation:
$6(8) - y = 24$
$48 - y = 24$
$-y = -24$
$y = 24$