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dimaraw [331]
3 years ago
14

Solve for R using cross multiplication

Mathematics
1 answer:
topjm [15]3 years ago
8 0

R/ r+ 15 = 3/8

Cross multiply: top of one side multiplied by bottom of other side:

R x 8 = 3 x r+ 15

Simplify:

8r = 3r + 45

Subtract 3r from both sides:

5r = 45

Divide both sides by 5:

R = 9

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