Asked by katy

Find the solution to the system of equations by using either graphing or substitution.

y+x=3
y-2x=18

(-4.5,7.5)
(-5,8)
(-6,9)
(-7.5,10.5)
Answered by katy
can someone please explain I am so confused..
Answered by oobleck
y+x=3
y-2x=18
subtract the bottom from the top and you have
3x = -15
x = -5
so, y = 8
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