Step 1: 3x+4−2x+9=17−x

A. Distributive property
B. Addition/Subtraction property
C. Multiplication/Division Property
D. Combine Like Terms

D. Combine Like Terms

To solve the given equation "3x+4−2x+9=17−x," we can go through the following steps:

Step 1: Identify and combine like terms.
By looking at the equation, we can see that the terms involving "x" are: +3x, -2x, and -x. To combine these like terms, we add them together:

3x - 2x - x + 4 + 9 = 17

Now, we have the equation: 0x + 13 = 17

This simplifies to: 13 = 17

Since these two numbers are not equal, this equation has no solution.

To solve the equation 3x + 4 - 2x + 9 = 17 - x, we need to go through a few steps:

Step 1: Simplify both sides of the equation by combining like terms.
On the left side of the equation, we have 3x - 2x, which simplifies to x. And on the right side of the equation, we have -x. So, the equation becomes:

x + 4 + 9 = 17 - x

Step 2: Simplify further by combining like terms on both sides.
On the left side of the equation, we have x + 4 + 9, which simplifies to x + 13. And on the right side of the equation, we have 17 - x. So, the equation becomes:

x + 13 = 17 - x

Step 3: Now, we can simplify further by getting rid of the -x on the right side of the equation. We can do this by adding x to both sides of the equation:

x + x + 13 = 17 - x + x

Simplifying further, we have:

2x + 13 = 17

Step 4: To isolate x on one side of the equation, we can subtract 13 from both sides:

2x + 13 - 13 = 17 - 13

Simplifying, we have:

2x = 4

Step 5: Finally, to solve for x, we divide both sides of the equation by 2:

(2x)/2 = 4/2

Simplifying, we have:

x = 2

So, the solution to the equation 3x + 4 - 2x + 9 = 17 - x is x = 2.

The step used to combine like terms in the equation was Option D: Combine Like Terms.