Question

Using elimination, what are the values of x and y for the system of equations below?

2x+y=10
4x-y=8




A. x = –9, y = 28
B. x = –1, y = 12
C. x = 3, y = 4
D. x = 6, y = 8

Answer 1

D?

Answer 2

using elimination means canceling out one of the variables by making the coefficients equal and opposite
for this problem the coefficients of y already equal and opposite so just add
so 6x = 18 solve for the linear one variable gives x = 3
with this value in either of the original find the value of the other variable
good practice to check the solution in the original

this is multiple choice only one with x = 3

Answer 3

do you have any questions?

Answer 4

then that makes my anwer A

Answer 5

@dan815

Answer 6

@UnkleRhaukus

Answer 7

you should at least read my post

Answer 8

i did

Answer 9

how is x 3 tho?

Answer 10

really?
I said it twice x = 3
there is only one choice with x = 3

Answer 11

i dont get how x is 3 tho

Answer 12

read my post slowly

Answer 13

repost
for this problem the coefficients of y already equal and opposite so just add so 6x = 18 solve for the linear one variable gives x = 3