Answer:
x+7
Step-by-step explanation:
Remove Parentheses
Collect like terms
Calculate
Answer:
c,b,a
Step-by-step explanation:
Let's use x as the number of questions she answered correctly. If we make an equation of out the question, it would be 8.7x+13=108.7 To solve the equation subtract 13 from both sides. So it will leave you with 8.7x=108.7-13, which is 8.7x=95.7. Divide both sides by 8.7, which will give you x=11. She answered 11 questions correctly.
The answer is 192 because the middle part is equal to 168 then you add 12 two time for the two side in the right and left so it equals to 192
