SOLUTION: Solve each set of equations by substitution or elimination: a) 2x-3y=18 2x+2y=28 b) 5x-2y=15 3x-2y=-21

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Solve each set of equations by substitution or elimination: a) 2x-3y=18 2x+2y=28 b) 5x-2y=15 3x-2y=-21       Log On


   

Question 1030029: Solve each set of equations by substitution or elimination:
a) 2x-3y=18
2x+2y=28
b) 5x-2y=15
3x-2y=-21
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Solve each set of equations by substitution or elimination:
a)
2x-3y=18
2x+2y=28
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Subtract and solve for "y"::
5y = 10
y = 2
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solve for "x":
x + y = 14
x = 14-2 = 12
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b)
5x-2y=15
3x-2y=-21
-------
Subtract and solve for "x"::
2x = 36
x = 18
---
Solve for "y":
2y = 5x-15
2y = 90-15
2y = 75
y = 37.5
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Cheers,
Stan H.