10x+9=7x

To solve the equation \(10x + 9 = 7x\), follow these steps:

1. Subtract \(7x\) from both sides to isolate the variable on one side: \[ 10x - 7x + 9 = 0 \] This simplifies to: \[ 3x + 9 = 0 \]

2. Subtract 9 from both sides: \[ 3x = -9 \]

3. Divide both sides by 3 to solve for \(x\): \[ x = -3 \]

So, the solution to the equation \(10x + 9 = 7x\) is \(x = -3\).