Question

Solve the system algebraically.



2x + y - 10 = 0

x - y - 5 = 0



What is the value of y?

-5/3
0
5

Answer 1

just add them up, vertically

Answer 2

you can isolate x and you can said that x=y+5
now on the first equation substitute x for (y+5) and find value of y

Answer 3

"y" drops right off, you'd get "x", then use your "x" value on either equation

Answer 4

yes that is another way, you can add

Answer 5

so what would the answer be i did that and got like thirteen>

Answer 6

you have
2x +y -10 = 0
x -y -5 = 0
----------------
3x -15 = 0

Answer 7

solve for x

Answer 8

oooooooooooooooohhhhhhhhhhhhhhhhhhhhhhhhhhhh. thank you so much. i am doing an algebra class to get ahead this summer so it is like stepping into a whole new world. i thank you for that help @ivettef365

Answer 9

so what did you get for x

Answer 10

...3x = 15

Answer 11

you also couldve doubled the bottom one in order to cancel the x variable. it wouldve become 2x - 2y - 10

Answer 12

subtracting that from the top equation would give 3y = 0