Question

Simplify 7x + 7 + 6x - 9.

13x - 2
13x + 2
11x

Answer 1

To do this you must combine like terms as follows.

7x + 6x = 13x
7 - 9 = -2

Combine these together and you will get the following.

13 - 2 or -2 +13

Answer 2

x = -2/13

Explanation:

This is a first degree polynomial. To solve it, you need to follow these steps:

Step 1: Equate the polynomial to zero

7x + 7 + 6x - 9 = 0

Step 2: Separate all numbers that have variable "x" on one side of equality and real numbers on the other side

7x + 6x + 7-9

Note: Remember that if you are going to pass a number from side to side the equality is reversed.

Step 3: Add Both Sides

13x = -2

Step 4: Isolate the "x" Variable

x = -2/13