Question

Which number can each term of the equation be multiplied by to eliminate the decimals before solving? -m+0.02+2.1m=-1.45-4.81m

Answer 1

we have that

$m+0.02+2.1m=-1.45-4.81m$

to eliminate the decimals before solving multiply by $100$ both sides

$100*(m+0.02+2.1m)=100*(-1.45-4.81m)\\ 100m+2+210m=-145-481m\\ 100m+210m+481m=-145-2\\ 791m=-147\\\\ m=- \frac{147}{791}$

therefore

the answer is

The number is $100$

Answer 2

The number that each term of the equation be multiplied by to eliminate the decimals before solving -m+0.02+2.1m=-1.45-4.81m

It would be better to group all similar numbers.
-m+0.02+2.1m=-1.45-4.81m
-m + 2.1m + 4.81m = -1.45 - 0.02
5.91m = -1.47

The equation shown above, in order for us to eliminate the decimal, 
we need to divide 5.91.