6x+x=90

To solve the equation \( 6x + x = 90 \), we start by combining like terms on the left side.

Combine \( 6x \) and \( x \): \[ 6x + x = 7x \] Now the equation simplifies to: \[ 7x = 90 \]

Next, we solve for \( x \) by dividing both sides by 7: \[ x = \frac{90}{7} \]

This simplifies to: \[ x \approx 12.857 \]

So the solution to the equation \( 6x + x = 90 \) is: \[ x = \frac{90}{7} \quad \text{or approximately} \quad 12.857 \]