2 years ago

-2/3x-7y=6 x+3y=-9 solve by substitution

Mathematics

1 answer:

Nata [24]2 years ago

5 0

Answer:

y = 0; x = -9

Step-by-step explanation:

In order to have a variable to substitute, we can isolate x by subtracting 3y from both sides, which gives us x = -3y - 9

Thus, by plugging in this x into the first equation, we have:

$-2/3(-3y-9)-7y=6\\2y+6-7y=6\\-5y+6=6\\-5y=0\\y=0\\\\x+3(0)=-9\\x=-9$

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