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Home Q & A Board Science-Related Homework Help Mathematics
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rjlene rjlene
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12 years ago
solve the problem.  Do I solve for y or do I solve for x or does it matter please help I am not getting this! Thank you very much and I appreciate any help.
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julielpn74julielpn74
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12 years ago
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12 years ago
I suggest you check out my eHow article on how to solve a system of two equations and two unknowns by using the substitution method:
http://www.ehow.com/how_4847206_two-unknowns-using-substitution-method.html

You already know what y is from the second equation.  Plug this into y in the first equation and solve for x:
x+(3-2x)=6
x+3-2x=6
-x+3=6
-x=3
x= -3

Now plug this x value into either equation and solve for y.  I'll use the second equation, so:
y=3-2(-3)
y=3-(-6)
y=9

So, x= -3 and y=9.
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