SOLUTION: i need help soving a substitution problom
2x-3y=-14
3x-y=-7
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Question 172452: i need help soving a substitution problom
2x-3y=-14
3x-y=-7
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
2x-3y=-14
3x-y=-7
y = 3x+7 (from the 2nd eqn)
Sub into the 1st eqn
----------
2x-3y=-14
2x - 3(3x+7) = -14
2x - 9x - 21 = -14
-7x = 7
x = -1
-----------
3x-y=-7
3*(-1) - y = -7
-3 - y = -7
y = 4
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