SOLUTION: I have to use substitution to solve the equation below & don't know where or how to begin:
3x-5y=11
x-3y=1
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3x-5y=11
x-3y=1
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Question 244847: I have to use substitution to solve the equation below & don't know where or how to begin:
3x-5y=11
x-3y=1 Answer by dabanfield(803) (Show Source):
You can put this solution on YOUR website! First take the second equation X-(3*Y)=1 and rewrite it as X=(3*Y)+1.
Now substitute (3*Y)+1 into the first equation as follows:
(3*X)-(5*Y) = 11
3*((3*Y)+1))-(5*Y) = 11
(9*Y)+3 - (5*Y) = 11
Collecting terms we have:
4*Y + 3 = 11
4*Y = 8
Y = 2
Now substituting 2 for Y in the rewritten second equation we have:
X = (3*2) + 1
X = 7
The solution then is x=7 and Y = 2 or (7,2)
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