Solution I think I’m not 100% though:/
Well a million is 1,000,000,000. So 320,000,000,000 has 1" zeros
Step-by-step explanation:
Substitute the y in the 1st equation with the 2nd equation.
7x + 10(2x + 9) = 36
7x + 20x + 90 = 36
27x + 90 = 36
3x + 10 = 4
3x = -6
x = -2
So now we can find y.
y = 2x + 9 = 2(-2) + 9 = (-4) + 9 = 5.
So x = -2, y = 5.
3 repeating digits are there
Given:
Perimeter of a square = 
To find:
The side length of the square.
Solution:
We know that, the perimeter of the square is 4 times of its side length.

Where, a is the side length.
Perimeter of a square = 
Now,

Divide both sides by 4.



Therefore, the side length of the square is
units.