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3 years ago

Solve the literal equation for y. 20=8x+4y

Mathematics

2 answers:

lilavasa [31]3 years ago

6 0

Answer:

y=2x+5

Step-by-step explanation:

−8x+4y=20

Step 1: Add 8x to both sides.

−8x+4y+8x=20+8x

4y=8x+20

Step 2: Divide both sides by 4.

4y4=8x+204

y=2x+5

Fudgin [204]3 years ago

4 0

Answer:

y=2x+5

Step-by-step explanation:

Let's solve for y.

20=8x+4y

Step 1: Flip the equation.

8x+4y=20

Step 2: Add -8x to both sides.

8x+4y+−8x=20+−8x

4y=−8x+20

Step 3: Divide both sides by 4.

−8x+20

y=−2x+5

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4 years ago

Solve the system of equations using substitution y=x-1 and y=-2x+5

pav-90 [236]

Since the two equations equal y, set them equal to each other.

x-1=-2x+5

From there, solve for x.

First get x on one side, by using the addition property of equality.

x-1=-2x+5
3x-1=5

Isolate x by adding 1.
3x=6

Lastly get x all by itself by dividing each side by 3.
x=2

You can now substitute your x-value, 2, into one of the equations (or both, if you wish; either one will result in the same answer.)

y=x-1
y=2-1
y=1

OR

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y=-2(2)+5
y=-4+5
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Final answer:
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