I think it is X equals 20 because there’s 180 degrees I a triangle and 100+40= 140 and you have e 40 remaining and since it’s 2x you do 40 divided by 2 which is 20 do the inverse to check
6.2 is not a whole number
150/3 = 50 = a whole number
25 and 13 are whole numbers.
It would be: k+3 = 10
subtracting 3 from both sides,
k+3-3 = 10-3
k=7
Cut only to ends of the triangle off then it will have a pentagon with the uncut shape
