Answer:
12 and 28 is 4 next one is 375x2y then 588m2n2
Step-by-step explanation:
a.J+J+10=M
b. 15+10=25M
c. 9-10=-1 9+(-1)=8
y = 2
The variable is equal to 2
9y + 3 = 21
-3 -3
9y = 18
Divide both sides by 9