Question

can u introduce me algebra , class 6th​

Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Algebra

Algebra is a part of mathematics in which the letter and symbols are used to represent numbers in equations. It helps us to study unknown quantities.

The Idea of a Variable

Variable refers to the unknown quantities that can change or vary and are represented using the lowercase letter of the English alphabet.

More Examples of Variables

• We can use any letter as a variable, but only lowercase English alphabets.
• Numbers cannot be used for the variable as they have a fixed value.
• They can also help in solving some other problems.

Expressions With Variables

We know that variables can take different values; they have no fixed value. But they are numbers. That is why as in the case of numbers, operations of addition, subtraction, multiplication, and division can be performed on them. Using different operations, we can form expressions with variables like x – 2, x + 1, 3n, 2m, p4, 2y + 5, 3l – 7, etc.

Note: A number of expressions can be immediately evaluated.

For example: 3 × 4 + 6 = 12 + 6 = 18

But an expression containing the variable x cannot be evaluated until x is assigned the same value.

For example,

When x = 1, 4x + 3 = 4 × 1 + 3 = 4 + 3 = 7.

Ex - Manu has 2 erasers more than Tanu. Form an expression for the statement.

 Erasers that Tanu have can be represented using a variable (x)

Erasers that Manu have = erasers that Tanu have + 2

Erasers with Manu = x + 2

Erasers that Manu have can be represented using a variable (y)

Erasers that Tanu has = erasers that Manu have - 2

Erasers with Tanu = y - 2

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