To solve the equation 15 – 4 – 7x + 9 = 0, we start by simplifying the left side.
First, perform the arithmetic operations:
- Combine the constant terms: 15 – 4 + 9
- This simplifies to 20.
The equation now looks like:
20 – 7x = 0
Next, isolate the variable x:
- Subtract 20 from both sides: -7x = -20
- Now, divide both sides by -7 to solve for x: x = -20 / -7
This simplifies to:
x = 20/7 or approximately 2.857.
Thus, the solution to the equation is x = 20/7.