ACT Math 7.3 Pre-Algebra
ACT Math: Pre-Algebra Drill 7, Problem 3. Solve for x.
One-Variable Equations and Inequalities
Solve equations and inequalities in one variable
|Foreign Language||Arabic Subtitled|
|Pre-Algebra||Linear equations in one variable|
Simple linear equations with one variable
|Product Type||ACT Math|
Let's start by dieting down the parentheses with respect to our friend Mr. PEMDAS.
Multiply across the 2 here and we get 2 times 3x is 6x.
2 times 2x is 4x and 2 times negative 5 is negative 10...
...then just keep going to get rid of the 2nd set of parentheses by allocating the negative
sign to get negative 6x minus 1.
And the rewritten problem looks like this:
Now we just combine terms. The 6x's cancel each other out, so just cross 'em off... and
we have 4x minus 11 equals 1.
Add 11 to both sides and we have 4x equals 12. Divide both sides by 4 and we have x equals...3.
As in, 'Diet shakes.'