Class 6 Maths Algebra | Expressions with Variables |

__Expressions with Variables__

__Variables do not have a fix value. But since they are numbers, different operations of addition, subtraction, multiplication and division can be done on them. Expressions can also be formed containing variables. For e.g.:__

3x +5. But only when the variable, in this case x, is given some value the expression can be evaluation. If x = 4, then the value of expression is 3(4) + 5= 17.

Expression can be formed in various ways. Some examples are as follows:

Problem: Give expressions for the following cases.

- 7 added to
*p*

=7 +p

*p*multiplied by 7

= p*7

*p*divided by 7

= p/7

- 7 subtracted from –
*m*

= -m-7

Problem: Give expressions in the following cases.

- 11 added to 2
*m*

= 11+2m

- 11 subtracted from 2
*m*

= 2m -11

- 5 times
*y*to which 3 is added

= 5y +3

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