combine like terms to generate an equivalent expression to 4y+3x-x+2x+12-8 and i have to show the work and not just the answer​

Will gve pints stars and brainliest

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

Collin did the work to see if 10 is a solution to the equation r/4=2.4