SOLUTION: Solve the system by the substitution method: x= 2y + 5 9x + y= -126 what is x and y?

Question 188026This question is from textbook Saxon
: Solve the system by the substitution method:
x= 2y + 5
9x + y= -126
what is x and y? This question is from textbook Saxon

Answer by feliz1965(151) (Show Source): You can put this solution on YOUR website!
x= 2y + 5
9x + y= -126

You are given x to be 2y + 5.
Plug that into the other equation to find y.
9(2y + 5) + y = -126
18y + 45 + y = -126
19y = -126 - 45
19y = 171
y = 171/19
y = 9
To find x, plug 9 for y in EITHER of the two equations given.
I will let you finish.

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