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3 years ago

-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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-4r-11=4r+21 pls help ​

-4r-11=4r+21 pls help