Question

Solve by using the substitution method.
8x+4y=-44
-2x+y=21
What is the solution of the system? HELP PLEASE

Answer 1

does anyone know the answer? I need it ASAP

Answer 2

You want to cancel one of the terms out to solve for one of the terms:
8x+4y=-44
4(-2x+y)=21(4)
so...
8x+4y=-44
-8x+4y=84
the 8x's cancel out, leaving...
4y=-44
(+)4y=84
equals
8y=40
y=5

Answer 3

Now substitute y=5 into either of the equations and solve for x

Answer 4

8x+4(5)=-44; 8x+20=-44; 8x=-64; x=-8

so, x=-8 and y=5

Answer 5

so if written as an order pair the solution would be (-8,5)?

Answer 6

That's the substitution method - you want to cancel out a term to solve for the other term, then substitute back in to solve for the other term.

Answer 7

yes

Answer 8

Got it , thanks!

Answer 9

No prob.

Answer 10

I have some other question i need help with . I'll post them in a new question