Question

I don’t understand how to do this.

Answer 1

-9 = 0.45m

Explanation:

0.45m - 9 = 0.9m

combine the like terms

-9 = 0.9m - 0.45m

-9 = 0.45m

Answer 2

-9 = 0.45m

Explanation:

0.45m -9 = 0.9m

-0.45m -0.45m

-9 = 0.45m