Question

17. Mohini is x years old. Express the following in algebraic form:
(i) three times Mohini's age next year.
(ii) four times Mohini's age 3 years ago.
(iii) the present age of Mohini's uncle, if his uncle is 5 times as old as Mohini will
be two years from now.

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Answer 1

Answer:

(i) 3(x + 1) years

(ii) 4(x – 3) years

(iii) 5(x + 2) years

Step-by-step explanation:

(i) Let Mohini's age be x.

Mohini's age next year = x + 1

Three times mohini's age next year = 3(x + 1)

(ii) Let Mohini's age be x.

Mohini's age 3 years ago = x - 3

Four times Mohini's age 3 years ago = 4(x−3)

(iii) Let Mohini's age be x.

5(x + 2) years

Different types of algebraic expressions :

Addition : $x + 5 = 12$

Subtraction : $x - 6 = 6$

Multiplication : $7x = 35$

Division : $\frac{x}{3} = 2$

Answer 2

Step-by-step explanation:

7. Mohini is x years old. Express the following in algebraic form:

(i) three times Mohini's age next year.

(ii) four times Mohini's age 3 years ago.

(iii) the present age of Mohini's uncle, if his uncle is 5 times as old as Mohini will

be two years from now.