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In the equation 2r – 7 = 15, what value of r makes this equation true?
Question
In the equation 2r – 7 = 15, what value of r makes this equation true?
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Mathematics
3 years
2021-08-18T14:15:29+00:00
2021-08-18T14:15:29+00:00 1 Answers
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Answer:
r = 11 makes 2r – 7 = 15 true.
Step-by-step explanation:
2r – 7 = 15
Add 7 to both sides.
2r = 22
Divide by 2.
r = 11
Proof:
2r – 7 = 15
2(11) – 7 = 15
22 – 7 = 15
15 = 15