Which expression is equivalent to 1/3(5x+3y)+2/5y+7
A5/3x+7/5y+7
B15x+2/5y+7
C5/3x+2/5y+7
D.15x+9 2/5y+7
A5/3x+7/5y+7
B15x+2/5y+7
C5/3x+2/5y+7