Question

$\frac{2}{7} + \frac{3}{5} =x.3+ \frac{1}{2}$

Answer 1

$\frac{2}{7}+\frac{3}{5} = 3x+\frac{1}{2} \\ \\ \frac{20+42 = 210x+35}{70} \\ \\ 62 = 210x+35 \\ \\ 210x = 27 \\ \\\boxed{ x = \frac{27}{210} = \frac{9}{70} }$

Espero ter ajudado. :))

Answer 2

$\frac{2}{7}+\frac{3}{5}=x\cdot3+\frac{1}{2}\\\\\frac{2}{7/10}+\frac{3}{5/14}=\frac{3x}{1/70}+\frac{1}{2/35}\\\\20+42=210x+35\\210x=27\;\;\div(3\\\boxed{x=\frac{9}{70}}$