The idea may be taught with written descriptions supported by necessary Braille text
material. To enhance the understanding level of the child, he/she may be facilitated
to perform a few sums on his/her own.
- Equation
An equation is a statement in which the values of two mathematical expressions
are equal, indicated by the sign ‘=’.
Eg. : x + 5 = 3
2x + 7y – 3z = 21
The meaning and the significance of the symbol ‘=’ is to be emphasized initially and
then sufficient number of examples are to be given.
- Solution of an equation
Solution is a means of solving an equation. In other words, solution of an equation
is the value of the unknown variable which when substituted, will satisfy the equation.
Eg. : Consider the equation, 2x + 4 = 10
On solving this equation, 2x = 10 – 4
2x = 6
Therefore, x = 26
ie., x = 3
On substitution of the value of ‘x’ in the given equation,
2(3) + 4 = 10
6 + 4 = 10
10 = 10
That is, the given equation with an unknown variable is satisfied when the unknown
variable is substituted with the value of 3.
