Question

Which is a solution to the equation 5x – y = –3?
a.2,-7
b.1,2
c.-2,7
d.-2,-7

Answer 1

@helpme1.2 @jdoe0001 guys my brains gone out. I learned this but forgot it...

Answer 2

well.... you have choices of ordered pairs, that is (x, y)

say the 1st one is (2, -7) x = 2, y = -7

so let's try that one, let's plug it in our equation

5 x - y = -3
5(2) - (-7) = -3
10+7 \(\ne\) - 3

so is not a)


now try the others

Answer 3

when the left side matches the right side, then that's the solution

Answer 4

Oh i think i learned it by doing something like this:
5x - (0) = -3
and then
5(0) - y = -3

Answer 5

school confuses u...

Answer 6

homeschooling confuses me

Answer 7

you could also solve for each variable individually.

isolate each variable one at a time and solve :)

but @jdoe0001's way works too :) since you have answer choices, just sub in :)

Answer 8

^^ Just plug in the values and it should give you -3

Answer 9

ok thx :$

Answer 10

Why the ":S"