Question

https://crookcountysd.owschools.com/media/g_alg01_2013/10/32b.gif is that 36

Answer 1

salve for a

Answer 2

\( \Large \frac a4 + \frac a3 = 21\)

Least common denominator of 3 and 4 is 12.
Multiply throughout by 12:
\( \Large \frac a4 * 12 + \frac a3 * 12 = 21 * 12\)

\( \Large 3a+ 4a = 252\)
\( \Large 7a = 252\)
\( \Large a = \frac{252}{7} = 36\)

Answer 3

so yes