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Vedmedyk [2.9K]
3 years ago
13

Solve the equation using mental math. 7 + r = 15

Mathematics
2 answers:
VladimirAG [237]3 years ago
7 0

Answer:

\displaystyle 8 = r

Step-by-step explanation:

7 + r = 15

- 7 - 7

________

\displaystyle r = 8

I am joyous to assist you anytime.

mrs_skeptik [129]3 years ago
5 0

Answer:

r = 8

Step-by-step explanation:

7 + 8 = 15

so r = 8!

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Step 1

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we know that

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