Question

5. Solve this system

x=2y-8

4x+y=13


A. (-2,-5)


B. (2,-5)


C. (2,5)


D. (-2,5)

Answer 1

x = 2y - 8
now sub 2y - 8 in for x in the other equation
4x + y = 13
4(2y - 8) + y = 13 -- distribute through the parenthesis
8y - 32 + y = 13
8y + y = 13 + 32
9y = 45
y = 5
now sub 5 in for y in either equation to find x
x = 2y - 8
x = 2(5) - 8
x = 10 - 8
x = 2

solution is : (2,5)

Answer 2

Thanks

Answer 3

sure thing :)