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

i really need help

Answer 2

i can help! :)

Answer 3

great

Answer 4

y=0 but i will explain why

Answer 5

\[2 x + 1 y = 10 \]

Answer 6

\[1 x -1 y = 5 \]

Answer 7

Eliminate y
multiply both by 1

Answer 8

\[2 x + 1 y = 10 \]

Answer 9

\[1 x + -1 y = 5 \]

Answer 10

Add the two equations

Answer 11

\[3x=\frac{ 15 }{ 3 }\]

Answer 12

\[x = 5 \]

Answer 13

plug value of x in \[2 x + 1 y = 10 \]

Answer 14

\[10 + 1 y = 10 \]

Answer 15

\[1 y = 10 -10\]

Answer 16

\[y = 0 \]