11a^3 + 6 - (-7a^3 + 7)....distribute the - through the parenthesis
11a^3 + 6 + 7a^3 - 7....combine like terms
18a^3 - 1 <===
A is the correct answer because 90 minus 40 is 50 50 divided by 2 is 25
Start with the sum of x and 9, giving the expression
This is divided by 2 so
This equals 3x so the equation is
This can the be solved.
Multiply both sides by 2 to get
Then take x from both sides
Divide by 5 to get the value for x
The answer is C
Is shows a change of rate for the integer
Hope this helps
just add all the sides that is it. no special treatment