20jhuffman
08.07.2019 •
Mathematics
Brian's comic book collection increased from 120 to 150 comic books. by what percentage did his collection increase?
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Ответ:
(150-120)/120=
30/120=
¼.
the collection increased by 25%
Ответ:
Jason can substitute
into the equation to check his answer. The left side of the equation must be equal to the right side of the equation.
Step-by-step explanation:
The equation
must be solved by calculating the value of x:
Add like terms:
Divide both sides by -12:
Now he can substitute
into the equation and simplify to check his answer.
If his answer is right, the left side of the equation will be equal to the right side of the equation.
Then: