Hey there!
EQUATION #1
SOLVING FOR THE Y-VALUE
10+10+10+10+10+10+10+10+10+9 = y
= 20 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 9
= 30 + 10 + 10 + 10 + 10 + 10 + 10 + 9
= 40 + 10 + 10 + 10 + 10 + 10 + 9
= 50 + 10 + 10 + 10 + 10 + 9
= 60 + 10 + 10 + 10 + 9
= 70 + 10 + 10 + 9
= 80 + 10 + 9
= 90 + 9
= 99
y = 99
EQUATION #2
SOLVING FOR THE A-VALUE
y * 9 = a
99 * 9 = a
99+99+99+99+99+99+99+99+99 = a
a = 198 + 198 + 198 + 198 + 99
a = 396 + 396 + 99
a = 791 + 99
a = 891
a = 891
EQUATION #3
SOLVING FOR THE M-VALUE
a + 9 = m
891 + 9 = 900
m = 900
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)