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Substitution this -5x-6y=-15y=3x-9
4 months ago
Q:
substitution this -5x-6y=-15y=3x-9
Accepted Solution
A:
Substitute the second equation into the first.
So, -5x-6(3x-9)=-15
-5x-18x+54=-15
-23x=-69
x=3
Now plug in to second equation to get y.
y=3(3)-9=9-9=0
So x=3, y=0
Check with first equation:
-5(3)-6(0)=-15
-15=-15. It works.