Question

how to solve 27=1/2×(a+20) step by step?​

Answer 1

$27 = \frac{1}{2} (a + 20) \\ \\ 27 \times 2 = a + 20 \\ \\ 54 = a + 20 \\ \\ a = 54 - 20 \\ \\ \underline{a = 34}$