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A linear equation may have any number of variables. Suppose it is n then the linear equation is of the form a_{1}x_{1} + a_{2}x_{2}+a_{3}x_{3}+…………+a_{n} x_{n} = CC

C is a constant and x_{1}, x_{2}…….,x_{n}are variables

C is a constant and x

1)What is the degree of x² + 3y = 12 ?

The power of x is 2 and the power of y is 1.

Degree = Highest power = 2

The power of x is 2 and the power of y is 1.

Degree = Highest power = 2

2x +3- 3 = 19– 3 (Add -3 on both sides)

2x/2 = 16/2(Divide by 2 on both sides)

x = 8

4) Choose a Linear expression from the following

(a) y²

(b) 6x/2y

(c) 2xy + 6

(d) 7x + 9y

(e) √y

**Answer: d**

(a) y²

(b) 6x/2y

(c) 2xy + 6

(d) 7x + 9y

(e) √y

5) x + 2² = 12. Solve for x

x + 4 = 12 (Square the number)

x + 4 – 4= 12–4 (Add -4 on both sides)

x = 8

x + 4 = 12 (Square the number)

x + 4 – 4= 12–4 (Add -4 on both sides)

x = 8