Question

Help please do this for me you will be the best :)​

Answer 1

15. Find x. The Ab and CD must be of equal length in a rectangle. so we can also say that 4x-60 is equal to 30-x

4x-60 = 30-x        | + x   (same oparation on both sides)

5x - 60 = 30         | +60 (as above. to have x on one side and, seperated, pure numbers on the other side)

5x = 90                 | divide by 5 on both sides

x = 18