Transcription of Unit-4 simple equation
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Unit-4 simple equation
The word variable means something that can vary , change andconstant means that does not vary. The value of a variable is notfixed. Variables are denoted usually by letters of the English alphabetssuch as x, y, z, l, m, n, p, a etc. The expressions are formed by performing operations like addition,subtraction, multiplication and division on the variables andconstants. An equation is a condition on a variable (or variables) such that twoexpressions in the variable (variables) have equal value. The value of the variable for which the equation is satisfied is calledthe solution or root of the equation . An equation remains the same if the LHS and the RHS areinterchanged. In case of balanced equation if we (i) add the same number to boththe sides, or (ii) subtract the same number from both the sides, or(iii) multiply both sides by the same non-zero number or (iv) divideboth sides by the same non-zero number, the balance remainsundisturbed.
In Examples 4 to 6, fill in the blanks to make it a true statement. Example 4: Any value of the variable which makes both sides of an equation equal, is known as a _____ of the equation.
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