Answer:
25, 26, 27
Step-by-step explanation:
x+x+1+x+2=x+53
3x+3=x+53
2x=50
x=25
so x=25, x+1=26, x+2=27
Check the picture below.
so notice, their perimeter is the same, because the perimeter is just one rod anyway, and all rods are the same length, thus
1- Two times the sum of four and eight
2 x (4+8)
2- Seven less than eight
8-7
3-The product of x squared and thirteen
13x²