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4 years ago

6x-5y=22 y=-8 using systems of equations by substitution

2 answers:

5 0

$\left \{ {{6x-5y=22} \atop {y=-8}} \right. \\\\ substitute\ y=-8\ into\ first\ equation\\\\
6x-5*(-8)=22\\\\
6x+40=22\ \ \ | subtract\ 40\\\\
6x=-18\ \ \ | divide\ by\ 6\\\\
x=-3\\\\
y=-8$

Natasha_Volkova [10]4 years ago

3 0

We need to sub y=-8 into the first equation
6x+40=22
6x=-18
x=-3

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Answer:

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Step-by-step explanation:

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