Question

-m+9=10.2 зарание спасбо

Answer 1

-m+9 = 10.2
-m = 10.2-9
-m = 1.2
m= - 1.2

Answer 2

-m=10.2-9
-m=1.2
m=-1.2

Answer 3

-m=10.2-9
-m=1.2
m=-1.2