If a+3b=10, what is the value of 2a+6b=?

Acompany is making new soccer uniforms for a team. the company uses 2.5 yards of fabric for each shirt. the company uses 82.5 yards of fabric to make shirts and shorts for 15 players. the equation and solution below represents the situation. 15(2.5+x)=82.5; x=3 what does the solution, x=3, represent?

Asap! i'm not good math and i'm lost.

Which expression and diagram represent “renee biked four times as far this month as last month”?