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X=3y-1 2x+y=12 Solve the system of equations using the substitution method
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X=3y-1 2x+y=12 Solve the system of equations using the substitution method
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May 3, 2018
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X=3y-1
2x+y=12
Solve the system of equations using the substitution method
Mathematics
college
Vlad Gincher
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Vlad Gincher
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Substitute the top equation in as X in the 2nd equation.
2(3y-1)+y=12
Simplify to:
6y-2+y=12
7y-2=12
Add 2 to both sides
7y=14
Divide 7 from both sides
y=2
Find X by substituting y in the first equation
X=3(2)-1
X=6-1
X=5
x=5 y=2
Jake Rayson
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May 9, 2018
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Jake Rayson
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