Simplify: x - y + 2x - 2 + 3y + 3 + 2y - x

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Julius went on a volunteer trip to centralamerica and took medical supplies with him. he packed a bag with 50 pounds of supplies. he brought pieces of equipment that weighed10 pounds each and bottles of medicine thatweighed pound each prepresents thenumber of pieces of equipment he broughtand b represents the number of bottles ofmedicine he brought then the total weight canbe represented by the equation 10p+b 50.the brought 3 pieces of equipment, how manybottles of medicine did he bring?

An architect is making a model version of your house. she plans to use a 1: 25 scale, which means every inch on the model equates to 25" on your house. if a part of the model measures 7", what would the corresponding measurement be on your house? convert this measurement to feet and inches.