10-6v+9v=28
10+3v=28
-10 -10
3v=18
3 3
v=6
Step 1: Find the Lowest Common Multiple between the denominators.
Step 2: Multiply the numerator and denominator of each fraction by a number (the one that will get them to the lcm) so that they have the LCM as their new denominator.
Step 3: Add or subtract the numerators and keep the denominator the same.
0.98 is already rounded
it may also be asking for 0.980, which is equal but shows the thousandth place
ANSWER

EXPLANATION
The expressions are

and

The greatest common factor is the product the least powers of the common factors.
