Solving Two-Step Equations Using Addition and Subtraction
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Solving two-step equations can be tricky, but at least they’re easier than doing the Texas Two-Step. We trip over our feet so often you’d think we were a centipede.
|Basic Algebra||Basic Equations|
|Basic Operations||Addition and Subtraction|
Unfortunately his only talent is disco...and the ability to grow more chest hair than a
gorilla in a leisure suit. Darlo boogies away for three rounds of the
tune "Disco Love" and six minutes of "Dance Fever."
If Darlo continues these dance moves for exactly ten minutes before getting annihilated by
...can you determine how long the song "Disco Love" is?
First we'll need to find the variable. Since we want to solve for Disco Love's length,
we'll call that x. Darlo dances "Disco Love" three times, so
we'll write 3x.
Now we'll add the six minutes he grooves to "Dance Fever."
Darlo dances for a total of 10 minutes. So 3x + 6 = 10
Like bad polyester, there is a whole bunch of stuff we don't need in order to solve for
To get all the x's on one side, we can subtract 6 from both sides to get 3x equals 4.
Remember to make the same move on both sides of that equal sign to maintain equality.
To solve for x, divide both sides by 3. 3x divided by 3 equals x... so there you have
it! x equals four thirds.
This means that "Disco Love" is four-thirds minutes long...
...which, in English, is one minute and twenty seconds too long.
And one more thing.
Darlo, next time you fall for a girl, make sure her boyfriend isn't on the football team.
And the basketball team.
And the soccer team.