Question

10*(1,37R-0,12R)/5/8=0

Answer 1

1,37R-0,12R=0
1,25R=0
R=0

Answer 2

$frac{10*(1.37R-0.12R)}{0.625} =0\10*(1.37R-0.12R)=0\1.37R-0.12R=0\1.25R=0\R=0$