ACT Math 1.1 Elementary Algebra
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ACT Math: Elementary Algebra Drill 1, Problem 1. What is Ben's current age?
|ACT Math||Elementary Algebra|
|ACT Mathematics||Elementary Algebra|
|Elementary Algebra||Using variables to express functional relationships|
Variables to express relationships
|Foreign Language||Arabic Subtitled|
|Mathematics and Statistics Assessment||Modeling and Applications|
|Pre-Algebra||Data collection, representation, and interpretation|
|Product Type||ACT English|
It's asking for Ben's current age...
...but the key thing to notice is that the question is asking for the answer not in terms
of B, but in terms of J, Jerry years.
We can start with the variables B and J first.
We're told that, in 7 years, Ben will be 6 times Jerry's current age.
"In 7 years" means we add 7 to Ben's current age, and set that equal to 6J.
So we get B plus 7 equals 6J.
To isolate B by itself, we can subtract 7 from both sides and get B equals 6J minus
7... or the answer B.
As in, "Brownie Batter."