CAHSEE Math 5.2 Algebra I

Algebra I Drill 5, Problem 2. Which of the coordinates is a solution to the following system of equations?

AlgebraSystems of Equations
Algebra ISolving systems of equations
CAHSEE MathAlgebra I
LanguageEnglish Language
Systems of EquationsGraphing
Linear and Nonlinear Equations

Transcript

00:24

But in this kind of substitution, everywhere we see a y here, we can put in a 2x and simplify

00:30

our life a bit by getting a real number for y.

00:34

So we rewrite the equation like this – and we have

00:36

4x minus 3 times 2x equals negative 24.

00:41

Simplify even further and we get 4x minus 6x equals negative 24.

00:47

We have negative 2x equals negative 24… so we can multiply both sides by negative

00:52

1 to get 2x equals 24… or x equals 12.

00:56

Now we can just substitute the 12 times 2 to get 24 for our y value.

01:00

So we get 12 and 24… and our answer is C.

01:03

As in, “Crapburger.”