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kogti [31]
3 years ago
5

-4r-11=4r+21 pls help ​

Mathematics
2 answers:
Masja [62]3 years ago
8 0

-4r-11=4r+21

Move 4r to the other side

Sign changes from +4r to -4r

-4r-4r-11=4r-4r+21

-4r-4r-11=21

-8r-11=21

Move -11 to the other side

Sign changes from -11 to +11

-8r-11+11=21+11

-8r=21+11

-8r=32

Divide both sides by -8

-8r/-8=32/-8

Answer: r=-4

gizmo_the_mogwai [7]3 years ago
4 0

Answer:

r=-4

Step-by-step explanation:

-4r-11=4r+21

Subract 4r from each side.

-4r-4r-11=21

-8r-11=21

Add 11 to each side.

-8r=21+11

-8r=32

Divide both sides by -8.

r=\frac{32}{-8}

r=-4

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Solve for x and y <br> 8x-2y=24
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Answer: For y it's y=4x−12 and for x it's x=12+y/4

Step-by-step explanation:

SOLVING FOR X

8x-2y=24

2(4x−y)=24

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4x=12+y

x=12+y/4

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Why would "-7" in the expression (x^2+3)-(x-7) become positive?
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In the figure shown, ABC is a right triangle with side lengths a, b, and c, and CD is an altitude to side AB. The side lengths o
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A

Step-by-step explanation:

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So,

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5 0
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