Question

7/12 n + 2/3 m -1/4 m=7
Чему равен m и n?

Answer 1

$frac{7}{12} n+ frac{2}{3} m- frac{1}{4} m=7$
$frac{7}{12} n+ frac{5}{12}m=7$
7n+5m=7*12=84
7n=84-5m
n=$frac{84-5m}{7}$
5m=84-7n
m=$frac{84-7n}{5}$