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Rzqust [24]
4 years ago
6

Help please! And thank u

Mathematics
2 answers:
Radda [10]4 years ago
6 0
A/7 + a/3 = 10
a = 21
Zigmanuir [339]4 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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