To find the perimeter you do length + width so you do 12.4 + 5.9 to get the perimeter.
It helps you multiply by two by giving you the answer to the expression.
Example: 2•5=10/
Eight times the quantity of a number and six.
8 (x+6)
We know that 2x + 5 = 10 - 3x, and because of this we can solve for x.
2x + 5 = 10 - 3x
+3x
5x + 5 = 10
-5
5x = 5
/5
x = 1
We can plug x into each x value to verify if this is true.
2(1) + 5 = 10 - 3(1)
2 + 5 = 10 - 3
7 = 7
