SOLUTION: 1/2 x + 1/3 y = -3/10 1/2 x +4 y = 45/2 Solve by substitution

Question 982406: 1/2 x + 1/3 y = -3/10
1/2 x +4 y = 45/2
Solve by substitution
Found 2 solutions by Edwin McCravy, stanbon:
Answer by Edwin McCravy(20063) (Show Source): You can put this solution on YOUR website!

Notice I've changed the fractions, but yours is done EXACTLY like this one. So use this as a model to do yours by. First let's clear of fractions Multiply the first equation by LCD=30 and the second equation through by 3 Solve the second equation for x Substitute for x in the first equation: Substitute in Now do yours exactly the same way using the above as a model. Edwin

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
1/2 x + 1/3 y = -3/10
1/2 x +4 y = 45/2
Solve by substitution
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1st:: Get rid of the denominators::
15x + 10y = -9
x + 8y = 45
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Solve for "x"::
x = 45-8y
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Substitute for "x" and solve for "y"::
15(45-8y) + 10y = -9
----
15*45-110y = -9
y = (15*45+9)/110
y = 342/55
====
Solve for "x":
x = 45-8[342/55]
x = -261/55
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Check the answers
15x + 10y = -9
15(-261/55)+10(342/55) = -9
-9 = -9
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Cheers,
Stan H.
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