Question

$(х+2,5)/1 frac{2}{7}=3,5$

Answer 1

$(x + frac{5}{2} ) times frac{2}{7} = frac{7}{2}$
$frac{2}{7} x + frac{5}{7} = frac{7}{2}$
$4x + 10 = 49$
$4x = 39$
$x = frac{39}{4}$
$x = 9 frac{3}{4}$
$x = 9.75$