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Leto [7]
3 years ago
10

Solve using substitution. y = -10x-10 y = -3x + 4

Mathematics
1 answer:
Nikolay [14]3 years ago
4 0
-10x-10 = -3x+4
+3x +3x
————————
-7x-10 = 4
+10 +10
————————
-7x = 14
then divide -7 on both side of the equal sign
you’ll get x=-2

then plug in -2 as x into one of the equations ( it doesn’t matter which one)

y= -10(-2)-10 = 20-10= 10

so y=10


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Answer:

y= (C -Ax)/B

x= (C -By)/A

Step-by-step explanation:

Ax+ By = C

solve for y

Subtract AX from each side

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Read 2 more answers
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