40.4k views
5 votes
2(4 - 2r) = -2(r + 5)

User Kittie
by
7.7k points

2 Answers

1 vote
8-4r = -2r-10
2r-4r=-10-8
-2r = -18
r = 9
User YaBCK
by
7.9k points
3 votes
2(4 - 2r) = -2(r + 5)

First, divide both sides by -2. / Your problem should look like:
-4 + 2r = r + 5
Second, regroup your terms. / Your problem should look like:
2r - 4 = r + 5
Third, add 4 to both sides. / Your problem should look like:
2r = r + 5 + 4
Fourth, add r + 5 + 4 to get r + 9. / Your problem should look like:
2r = r + 9
Fifth, subtract r from both sides. / Your problem should look like:
2r - r = 9
Sixth, subtract 2r - r to get r. / Your problem should look like:
r = 9

Answer: r = 9

User Greg Maletic
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8.2k points