Question

3a+a=20 6n-n=25 17/18-m=1/12 Помогитеееее

Answer 1

1)3а+а=20 4а=20 а=5  2)6n-n=25 5n=25 n=5  3)17/18-m=1/12 -m=1/2-17/18 -m=-4/9 m=4/9

Answer 2

$3a + a = 20 \\ 4a = 20 \\ a = 5 \\ \\ 6n - n = 25 \\ 5n = 25 \\ n = 5 \\ \\ \frac{17}{18} - m = \frac{1}{12} \\ \\ - m = \frac{1}{12} - \frac{17}{18} \\ \\ - m = - \frac{31}{36} \\ \\ m = \frac{31}{36}$