Answer:
Step-by-step explanation:
The denominator doesn't really matter here. You just have to add the numerators and then put the denominator back on again. The numerators are 3 and 1 and if you add 3 and 1 you will get 4. Now you have to put the denominator back on to the bottom of the numerator. So, if you but 5 on the bottom of 4 it will be .
To find the answer you do the opposite of what is given, so you do 12*5=60
Therefore x=60
Answer a=-6 b=8
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Commission: $4,800 * .03 = $144
Salary + Commission = $275 + $144 = $419
Answer: $419