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lora16 [44]
3 years ago
11

What is the answer to -5 +2y = 9 y = 7x ?

Mathematics
1 answer:
WARRIOR [948]3 years ago
7 0

Answer:

x = 1

y = 7

Step-by-step explanation:

Two equations, two unknowns. We know that y = 7x so we can substitute that into the first equation to get:

-5+2\left(7x\right)=9

-5+14x=9

14x=14

This gives us x = 1.

Now plug this bag into either equation to find y, I will use the second since it's easier:

y = 7(1) = 7

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Rudiy27

Simplify the left side.

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3−9x=2(−4x+7)

Simplify the right side.

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3−9x=−8x+14

Move all terms containing x

to the left side of the equation.

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3−x=14

Move all terms not containing x

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−x=11

Multiply each term in x=−11

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Only blue and white vans are made at a factory. The ratio of the number of blue vans to the number of white vans is 4 : 3 write
amid [387]

Answer:

4/7

Step-by-step explanation:

Number of Blue vans = 4

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Total number of vans = Number of Blue vans + Number of white vans

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7 0
3 years ago
A rectangle has a length that is three times the width . The perimeter of the rectangle is 40 feet.what is the area of the recta
charle [14.2K]

Answer:

The area is 15 feet

Step-by-step explanation:

So you are going to need two different equations-

l = w(3)

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Insert the first equation into the second-

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