7*(13-x)=42

To solve the equation \( 7(13 - x) = 42 \), follow these steps:

1. Distribute the 7: \[ 7 \cdot 13 - 7 \cdot x = 42 \] \[ 91 - 7x = 42 \]

2. Subtract 91 from both sides: \[ -7x = 42 - 91 \] \[ -7x = -49 \]

3. Divide both sides by -7: \[ x = \frac{-49}{-7} \] \[ x = 7 \]

So, the solution is \( x = 7 \).