In the elimination method, what would you do if you had the variable u want to cancel out, but they are the same sign.
for ex- this problem is just an example-
5x + 3y = 15
-12x + 3y = 20 can you just subtract the 3's or do you need to make one negative?

You can pick one equation and multiply by -1 to change the sign.

IN the example you have up, yes you would subtract the two 3ys but if they were doth negative, then you would add the two 3ys.

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o