Answer:
7x - 7
Step-by-step explanation:
Variable: X = the unknown number
2x + (-7) + 5x
= 7x - 7
<u>Given</u>:
The given expression is 
We need to determine the exponents in simplified form.
<u>Exponents in simplified form:</u>
Let us determine the exponent in simplified form.
Let us apply the exponent rule 
Thus, we have;

Adding the fractions, we get;

Cancelling the common terms, we have;

Simplifying the exponent, we get;

Adding the exponent, we have;

Thus, the simplified form of the expression is 
Answer:
X=-2
Step-by-step explanation:
Answer:
22
lets say that mike's age is x.
then gabrielle's age is 3x
that means that
x+3x=88
4x=88 /:4
x=22
Answer:
The answer is -20.
Step-by-step explanation:
(8 × 5) - (-6 × -10)
= 40 - 60
= -20