Question

Solve the system of equations by the substitution method.



Choose one answer.
a. (7, 2)
b. (-8, 2)
c. (-7, 1)
d. no solution

Answer 1

x+9y=2
-6x+8y=50

pick either x or y and solve for it in one of these equations. I will solve for "x" in the first of these equations:
x=2-9y
Now we input this x into our other equation and solve:
-6(2-9y)+8y=50
-12+18y+8y=50
26y=62
y=62/26, or,
y=31/13
Now to get x, we substitute this value of y into either equation. Using the first equation:
x=2-9(31/13)
x=2-(279/13)
x=-253/13

Answer 2

oooops....made an error above.

Answer 3

-6(2-9y)+8y=50
-12+54y+8y=50
62y=62
y=1

Answer 4

x=2-9(1)
x=-7

Answer 5

apparently i need more coffee this morning lol

Answer 6

Hahaha that's alright thank you!