SOLUTION: solve by the substitution method. 5x + 9y = -13 x = 10 - 6y

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Question 228256: solve by the substitution method.
5x + 9y = -13
x = 10 - 6y
Answer by JenniferTutors(83) About Me  (Show Source):
You can put this solution on YOUR website!
For this problem, you would substitute x+=+10+-6y into 5x%2B9y=-13
So, here's how it would look:
5%2810-6y%29%2B9y=-13
Now solve through order of operations:
50-30y%2B9y=-13
Now, combine like terms (add the y's together)
50-21y=-13
Next, you would get y by itself by subtracting the 50 from the left side to the right side of the equation.
-21y=-13-50
Then, add 13 and 50, keep the negative sign (both #'s are negative)
-21y=-63
Next, divide -21 onto both sides of the equation.
-21y%2F-21=-63%2F-21
y=3
3 is positive because a negative divided by a negative is positive.
Hope that helps.