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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 ‘’equal’’ sign.

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.

The perimeter of the figure is 35 cm and the perimeter is the sum of all sides.

Perimeter = sum of all sides

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 ‘’equal’’ sign.

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.

The equation x + 31 cm $=35$cm

Solve the equation step by step

$\begin{array}{l}\text{ â¶Ä‰}x\text{ â¶Ä‰}+\text{ â¶Ä‰}31\text{ â¶Ä‰cm â¶Ä‰}=\text{ â¶Ä‰}35\text{ â¶Ä‰cm}\\ ⇒\text{ â¶Ä‰x+31 â¶Ä‰cm â¶Ä‰- â¶Ä‰31 â¶Ä‰cm â¶Ä‰= â¶Ä‰35cm â¶Ä‰- â¶Ä‰31 â¶Ä‰cmSubtract31cmfrombothsides}\\ ⇒\text{ â¶Ä‰}x\text{ â¶Ä‰}=\text{ â¶Ä‰}4\text{ â¶Ä‰cm}\end{array}$