What is the value of x? (the shape is a rectangle with the top side labelled 40 and the bottom side labelled 5x + 10)

enter your answer in the box.
**i got 26)

x = 26

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

What is the perimeter of an equilateral triangle if each side is (x+3)?

Jaxon has s packs of 8 crazy straws. he divided the crazy straws into 2 equal bags. now, he has 224 crazy straws in each bag. how many packs of crazy straws did jaxon start with?