Respuesta :

jcherry99
Not very old.

B = Ben
D = Daniel

B = 3D
B = D + 4 Put 3D in for B in the second equation.
3D = D + 4 Subtract D from both sides.
3D - D = 5
2D = 5 Divide by 2
D = 5/2
D = 2.5 Either answer will do.

B = 3*D
B = 2.5 * 3
B = 7.5 years old.
cheerthi16

Answer:

Ben is 6 years old and Daniel is 2 years old

Step-by-step explanation:

I took the test and put 7.5 and it was wrong. The correct answer is 2 years old.

Hope this helps! ;)