ACT Math 3.3 Intermediate Algebra

ACT Math: Intermediate Algebra Drill 3, Problem 3. Solve the equation for x.

ACT Math	Intermediate Algebra
ACT Mathematics	Intermediate Algebra
Foreign Language	Arabic Subtitled Chinese Subtitled Korean Subtitled Spanish Subtitled
Intermediate Algebra	Systems of equations
Language	English Language
One-Variable Equations and Inequalities	Solving Equations
Product Type	ACT Math

00:22

It's really just a "substitute n' solve" problem.

00:26

In the first equation, y is already isolated, so let's just substitute the first equation

00:32

into the second.

00:37

4 times the quantity 3 halves x plus 4 equals x plus 1.

00:44

Multiplying the 4, we get that 12x over 2... or just 6x... plus 16 equals x plus 1.

00:57

We combine like terms...so anything with an x goes together and both constants go together.

01:02

5x equals negative 15. Divide 5 from both sides, and we get x equals negative 3.

01:08

Looks like our answer is B.

01:09

As in, "Bad managing decision."