Respuesta :

MathPhys

Answer:

Francis did make an error.  He should add 2x to both sides of the equation.

5x = 10

Step-by-step explanation:

3x = 10 − 2x

To cancel the minus 2x, Francis should add 2x.

3x + 2x = 10 − 2x + 2x

5x = 10