Answer:
18
Step-by-step explanation:
To find the number, write an algebraic equation with the given information. Let the variable n represent the unknown number.
Now, break it by parts - "three times a number" would be
. The "is" means that it equals something, giving us
. "36 less than 5 times the number" would be subtracting 36 from whatever 5 times the number is:
. So, put it all together and it is
.
Next, solve the equation for n. The answer will be the number.

Thus, the number is 18.
length of square = 18
x = side of square
x-7 = side of triangle
3(x-7) + 39 = 4x
3x-21 + 39 = 4x
3x+18 = 4x
18=x
square 18x4 =72(perimeter square)
triangle side (18-7=11)
11x3 = 33(perimeter triangle)
72-33=39
Answer:0.3 there I said it
Step-by-step explanation:
Wait so the answers are down here right?