Problem 11 - Algebra Form and Function

Question

Solve the equations. $$ 13 t+2=49 $$

Step-by-Step Solution

Answer

Answer: The value of t in the equation is t = 47/13.

Step 1: Subtract 2 from both sides of the equation

Subtract 2 from both sides of the equation to get rid of the constant term: $$ 13t + 2 - 2 = 49 - 2 $$ This simplifies to: $$ 13t = 47 $$

Step 2: Divide both sides by 13

Now, to isolate t, we need to divide both sides of the equation by the coefficient of t, which is 13: $$ \frac{13t}{13}=\frac{47}{13} $$ This simplifies to: $$ t = \frac{47}{13} $$ Therefore, the solution to the given equation is: $$ t = \frac{47}{13} $$

Key Concepts

Algebraic Manipulation

Algebraic manipulation is the process of rearranging and simplifying equations to make them easier to solve. In the context of solving linear equations, it involves performing operations that transform the equation without changing its equality. By doing so, we can gradually isolate the variable we want to solve for, making it more straightforward to find its value.

For example, consider the equation \(13t + 2 = 49\). Here, we have to perform a series of operations to simplify and solve it:

• First, identify any constants that can be moved to the other side of the equation to simplify.
• Next, apply the inverse operation to both sides of the equation to eliminate these constants.
• Continue by isolating the variable term so it stands alone on one side of the equation.

These operations might include addition, subtraction, multiplication, or division, always applied equally to both sides of the equation. This step-by-step manipulation ensures the balance of the equation until the solution is reached.

Isolating Variables

Isolating variables is a crucial step in solving linear equations, as it allows you to express the variable explicitly. It involves getting the variable on one side of the equation and everything else on the opposite side.

Take the equation \(13t + 2 = 49\). To isolate \(t\), follow these steps:

• Begin by removing the constant term from the same side as the variable. In this case, subtract 2 from both sides to get \(13t = 47\).
• Next, consider the coefficient of the variable. Divide every term by this coefficient to isolate the variable. For \(13t = 47\), dividing by 13 leads to \(t = \frac{47}{13}\).

This process clears away numerical values around the variable, helping you focus on finding its true value.

Simplifying Equations

Simplifying equations is a technique used to make complex equations easier to interpret and solve, often involving reducing terms and making calculations less cumbersome. This involves finding and removing unnecessary parts of an equation.

In our example \(13t + 2 = 49\), simplifying rather than solving directly, involves:

• First, getting rid of terms that do not include the variable, such as by subtracting 2 from both sides to get \(13t = 47\).
• Then, simplifying the remaining equation by dividing through by the coefficient of the variable \(t\) to yield its exact value, \(t = \frac{47}{13}\).

Simplification not only aids in understanding but also ensures that you arrive at the precise solution with minimal errors.