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Chapter 2: Q12. (page 87)

Tell whether the given value of the variable is a solution of the equation.x+9=12;鈥�鈥�x鈥�鈥�=鈥�鈥�-鈥�鈥�3

Short Answer

Expert verified

No, x=-鈥�鈥�3is not the solution of the equation x+9=12

Step by step solution

01

Apply the concept of equation: 

An equation is a mathematical statement that two expressions are equal. The solution of an equation is the value that when substituted for the variable makes the equation a true statement.

Example: 3x + 5 = 14 is an equation, in which 3x+5 and 14 are two expressions separated by an 鈥樷�檈qual鈥欌�� sign.

02

What are the steps to solve an equation?

Step 1: Simplify each side of the equation by removing parenthesis and combining the like terms.

Step 2: Use addition or subtraction to isolate the variable term on one side (preferably in the left side).

Step 3: Use Multiplication or Division to solve for the variable.

03

Step 3: Tell whether the given value of the variable is a solution of the equation. x+9=12;  x=-  3

Solving the equation:

x+9=12x+9鈭�9=12鈭�9[Subtract9frombothsides]x=3

No, the solution of the equation is not negative 3. Correct solution x = 3.

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