2/3 (x-3)=5/3 what is the answer need so bad even though it looks easy

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.