Question

Solve 4x + 3y = 13
x + 5y = 33

A. (2, 7)

B. (–2, 7)

C. (2, –7)

D. (–2, –7)

Answer 1

So now we see how this equation has to be for it to be correct.

a. 8 + 21 = 13 --- NO
b. -8 + 21 = 13 --- YES
c. 8 - 21 = 13 --- NO
d. -8 - 21 = 13 --- NO

So your answer is B, just by using the first equation.

If you are unsure, just use the second equation and use substitution as well on that one.

You have x + 5y = 33

So it'll be...

a. 2 + 35 = 33 --- NO
b. -2 + 35 = 33 --- YES
c. 2 - 35 = 33 --- NO
d. -2 - 35 = 33 --- NO

Both equations have the answer B, so for SURE YOUR ANSWER IS GOING TO BE B!

Answer 2

Youre the bomb!!! :) Thankyou

Answer 3

Haha You're welcome :D