Respuesta :

Answer:

3x+6=9

Step-by-step explanation:

thre are 3 x's on one side and 6 1's

the other side has nine ones

3x+6=9 I think because on the left side you have 3 cubes labeled x (3x) and plus 6 circles (+6) and the weight of that is equal to the nine circles on the other side.