x = 8
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-4x' to each side of the equation.
72 + 9x + -4x = 112 + 4x + -4x
Combine like terms: 9x + -4x = 5x
72 + 5x = 112 + 4x + -4x
Combine like terms: 4x + -4x = 0
72 + 5x = 112 + 0
72 + 5x = 112
Add '-72' to each side of the equation.
72 + -72 + 5x = 112 + -72
Combine like terms: 72 + -72 = 0
0 + 5x = 112 + -72
5x = 112 + -72
Combine like terms: 112 + -72 = 40
5x = 40
Divide each side by '5'.
x = 8
The steps matter on the size of the number.
(1mile/57.1 sec) x (3,600 sec/hour) = 1 x 3600/57.1 = 63.05 mile/hour<span> (rounded)</span>
Each friend will get .6 of the pizza b/c 5 divided by 3 equals .6.
Answer:
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(x + 7) (x – 7)
