Question

2a+b=2a -b. A=2 by b=5by7.

Answer 1

Here is your answer.....

$2a + b = 2a - b \\ 2(2) + \frac{5}{7} = 2(2) - \frac{5}{7} \\ 4 + \frac{5}{7} = 4 - \frac{5}{7} \\ \frac{28 + 5}{7} = \frac{28 - 5}{7} \\ \frac{33}{7} = \frac{23}{7}$