SOLUTION: 7x-3y= -63
7x+77= y
solve by the substitution method, type an ordered pair.
I do not understand this please help
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Question 458293: 7x-3y= -63
7x+77= y
solve by the substitution method, type an ordered pair.
I do not understand this please help
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Your second equation tells you that 
. So you have this expression in 
that is equal to 
. That means that anywhere you see in the first equation, you can replace it with 
, like this:
\ =\ -63)
Now you have a simple linear equation in one variable. Solve it for . Once you have a value for substitute that value into the second equation and do the arithmetic required to calculate the value of .
Finally, represent your answer as an ordered pair )
where is the value you determined for above, and is the value you calculated for .
John
My calculator said it, I believe it, that settles it
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