How do I do this?

-2(6-r)=4

To solve this, you need to isolate/get the variable "r" by itself in the equation:

-2(6 - r) = 4   Divide -2 on both sides

6 - r = -2    Subtract 6 on both sides

6 - 6 - r = -2 - 6

-r = -8       Divide -1 on both sides to get "r" by itself

    (two negative signs cancel each other out and become positive)

r = 8

PROOF

-2(6 - r) = 4    Substitute/plug in 8 into "r"

-2(6 - 8) = 4

-2(-2) = 4

4 = 4

687.09 dollars       happy now

step-by-step explanation: 6870

1857 times .63 equals 1169.91 subtract that from 1857 you get 687.09

true

step-by-step explanation:

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