UPSKILL MATH PLUS
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Any equation is a condition on a variable. It is satisfied only for a definite value of the variable.
Consider the following equation x - 3 = 10.
Let us substitute a few values to x.
Value (x) | Equation (x - 3 = 10) | Equation satisfied or not? |
5 | 5 - 3 = 2 | No |
7 | 7 - 3 = 4 | No |
9 | 9 - 3 = 6 | No |
11 | 11 - 3 = 8 | No |
12 | 12 - 3 = 9 | No |
13 | 13 - 3 = 10 | Yes |
From the above tabular column, we can understand that the equation holds only to a specific condition.
Apart from 13 - 3 = 10, none of the conditions is satisfied.
Apart from 13 - 3 = 10, none of the conditions is satisfied.
An equation always contains an 'equal to' (=) sign in between.
In a valid equation, LHS will always be equal to the RHS.
Example:
1. 2m + 8 = 25
2. k - 6 = 52
Expression without an 'equal to' (=) sign is not considered an equation.
Example:
1. b > 5
2. h × 78
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