If 4x+5=13x+4-x-9 then x= ?

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4x + 5 = 12x -5

10 = 8x

10/8 = x

5/4 = x

10 = 8x

10/8 = x

5/4 = x

**Answer:**

x = 5/4

**General Formulas and Concepts:**

__Pre-Algebra__

Order of Operations: **BPEMDAS
**

- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction

- Left to Right

Equality Properties

__Algebra I__

- Combining Like Terms

**Step-by-step explanation:**

__Step 1: Define Equation__

4x + 5 = 13x + 4 - x - 9

__Step 2: Solve for ____x__

- Combine like terms: 4x + 5 = 12x - 5
- Subtract 4x on both sides: 5 = 8x - 5
- Isolate
*x*term: 10 = 8x - Isolate
*x*: 5/4 = x - Rewrite: x = 5/4

__Step 3: Check__

*Plug in x into the original equation to verify it's a solution.*

- Substitute in
*x*: 4(5/4) + 5 = 13(5/4) + 4 - 5/4 - 9 - Multiply: 5 + 5 = 65/4 + 4 - 5/4 - 9
- Add: 10 = 81/4 - 5/4 - 9
- Subtract: 10 = 19 - 9
- Subtract: 10 = 10

Here we see that 10 does indeed equal 10.

∴ x = 5/4 is the solution to the equation.

9(-9 + -f) + -7

Submit

9(-9 + -f) + -7

Submit

А

В

с

9х+7

- 3x+20

А

В

с

9х+7

- 3x+20

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