Answer:
use x to represent the unkown numbers
and y to represent the one number which is more than 11
so the equation will be like this
x+x+y=87
x+x+11=87
2x+11=87
2x=87-11
2x=76
now divide both sides by the x variable
2x/2=76/2
x=38
now you know one x to be 38
and the question made it clear that one number is eleven times more than the other
therefore the other number is 49
so 38+49=87
