SOLUTION: solve the system of equations by using the substitution method
2x-3y=9, y=x-4
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Question 549862: solve the system of equations by using the substitution method
2x-3y=9, y=x-4
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
2x-3y=9
2x-3(x-4)=9
2x-3(x-4)=9
2x-3x+12=9
-x+12=9
-x=9-12
-x=-3
x=(-3)/(-1)
x=3
-------------------------------------------------------
y=x-4
y=3-4
y=-1
So the solutions are x = 3 and y = -1
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