Last question I need help on y’all !!

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?

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

Percent increase and decrease. original number: 45 new number: 18