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3 years ago

Help please! And thank u

Mathematics

2 answers:

Radda [10]3 years ago

6 0

A/7 + a/3 = 10
a = 21

Zigmanuir [339]3 years ago

6 0

Answer:

$\frac{a}{7} + \frac{a}{3} = 10 \\ \frac{(3a + 7a)}{21} = 10 \\ \frac{10a}{21} = 10 \\ a = \frac{(10 \times 21)}{10} \\ \boxed{a = 21}$

<h3><u>a=21</u> is the right answer.</h3>

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