Megan’s room was remodeled. The new area of the room is 175% of the previous area. Only the length of the room changed. Square of side four meter. Rectangle is drawn adjacent to it with a width of x.

Part A
Which expression represents the new area of Megan’s room?
4x
x + 4
4(4 + x)
6(4 + x)
Part B
By how many square meters has the area of Megan’s room increased? Enter the number in the box.

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

The number is 80 because every number is multiplied by 2