Question

What is the value of the y-coordinate of the solution to the system of equations x − 2y = 1 and x + 4y = 7?

Answer 1

x+7

Answer 2

?

Answer 3

multiply the 1st eq with 2
2x-4y=2
x+4y=7
add both sides---> 3x=9-->x=3
replace---> 3-2y=1
-2y=-2
y=1

Answer 4

why did you multiply it by 2?

Answer 5

seemed like fun

Answer 6

cause i had to simplify y in order to make it easier

Answer 7

then how'd you get 7

Answer 8

then how'd you get 7

Answer 9

then how'd you get 7

Answer 10

then how'd you get 7