Question

(40)(40)+(60)(30)=(40)(v)+(60)(25), find v.

Answer 1

(40×40)+(60×30)=(40×v)+(60×25)
1600+1800=(40×v)+1500
3400-1500=40v
1900/40=v
v=47.5
hope you got it

Answer 2

1600 + 1800 = 40v + 1500
3400 = 40v + 1500
3400 - 1500 = 40v
1900 = 40v
v = 1900/40
v = 47.5