Basically, all you want to do is this:
do 5 divided by 6 (calculator preferred so you don't do a ton of division)
you get: 0.833333333
You then do 0.833333333 * 12
Your Answer:
10
No solution because -3a +3a is cancelled out and 6 does not equal 7
Answer: C
Step-by-step explanation:

Find the least common denominator of 4, 3, and 12.
4-3-12 | 3
4-1-4 | 4
1-1-1 |-------- 12
The first fractions needs to be multiplied by 3, and the second fraction, by 4

Solve;

Add the fractions with positive signs and subtract the one with negative sign.

Solve;

Simplify by 4;
16/4=4
12/4=3

Answer:25
Step-by-step explanation:
First u divide 189 by 7
Than u minus that by 2 and u got ur answer