Question

If the perimeter of this figure is 78 cm, what is the value of x?

Answer 1

Answer: x=12

1st step: (2x – 3) + (2x –3) = 4x – 6

2nd step: 4x –6 + (12) = 4x + 6

3rd step: 4x + 6 + (2x) = 6x + 6

4th step: 6x + 6 = 78
–6 –6

5th step: 6x /6 = 72/6

6th step: x = 12