Question

I need help solving solving these system of equations, please explain, and THANKS!

4x + 3y = -1
3x + y = 3

Answer 1

multiply 2nd equation using 3

Answer 2

then subtract both eqns to get an eqn in x

Answer 3

solve for x can u do tht ?

Answer 4

Why would I multiply the second equation by 3 though?

Answer 5

so that you can use elimination to solve the system of equations

Answer 6

or you could rearrange the second equation to make y the subject, then substitute it into the first one to solve for x.

Answer 7

Okay, I understand that substitution of the value of y into the second equation, but when all is solved, I'm left with the value of y being 7/3... and for some reason that quite bugs me as the wrong answer.. is it?

Answer 8

I solved for x which was 2, then subbed that into any other original equations and got 7/3 as y is that right?

Answer 9

try again ?

Answer 10

try what i said above

Answer 11

do you know how to do the elimination method?

Answer 12

@AravindG, I'm sorry but I just didn't quite fully understand what you meant by multiplying the second equation by three and then subtracting both equations to get an equation in x.

@Chelsea04, Yes, but how would you apply it here? and thanks btw

Answer 13

first multiply 2nd eqn completely by 3