Respuesta :
The answer is 13. Subtract 6x from both sides to get -3x= -15 so x equals 5.
5+8=13
5+8=13
First you have to find the value for x, so solve the equation 3x=6x-15. Subtract 6x from both sides to get -3x=-15. Finally, divide both sides by -3 to get x=5. Plus 5 into the x value for the other equation. 5+8=13