How can you use transformations to solve real-world problems?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

5x−4≥12 or 12x+5≤−4 can you with this problem

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so