7. what is the value of x? −4x − 6 = −34
a. −10
b. −7
c. 7
d. 10

-4x - 6 = -34

First, add '6' to both sides.

Second, subtract '-34 + 6' to get '-28'.

Third, divide both sides by '-4', leaving the 'x' by itself.

Fourth, simplify the fraction into a negative.

Fifth, how many times can 4 go into 28? Divide. 28 ÷ 4 = 7.


 C) x = 7

The shelves will hold 270 books in total