Answer these I will mark as brainliast

1.	Answer these I will mark as brainliast
Answer» (4) (a) One variable Explanation: The given equation contain only one unknown value i.e. x, Apart x, all the values are constant. So, it is an equation in one variable. ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ (5) (b) x = 11⠀⠀⠀⠀⠀⠀⠀⠀⠀ Explanation: Solution of the equation means : for what value of the variable the equation will be true. ➞⠀ $\sf 3x + 5 = 38$ ➞⠀ $\sf 3x = 38-5$ ➞⠀ $\sf 3x = 33$ ➞⠀ $\sf x = \dfrac{33}{3}$ ➞⠀ $\sf x = 11$ 11 is the solution of the equation. ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ (6) (c) 8⠀⠀⠀⠀⠀⠀⠀⠀⠀ Explanation: Twice the SUM of two numbers = 36 One number = 10 Let other number be x According to the QUESTION: ➞⠀ $\sf 2(x + 10) = 36$ ➞⠀ $\sf x + 10 = \dfrac{36}{2}$ ➞⠀ $\sf x + 10 = 18$ ➞⠀ $\sf x= 18-10$ ➞⠀ $\sf x = 8$ The other number is 8 ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ (7) (d) 15⠀⠀⠀⠀⠀⠀⠀⠀⠀ Explanation: ➞⠀ $\sf \dfrac{1}{2} +\dfrac{b}{10} = 2$ L.C.M of 2 and 10 is 10 ➞⠀ $\sf \dfrac{5+b}{10} = 2$ ➞⠀ $\sf 5 +b = 2\times 10$ ➞⠀ $\sf 5+b = 20$ ➞⠀ $\sf b= 20-5$ $\sf b = 15$ The value of b is 15 ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ (8) (d) x = 12⠀⠀⠀⠀⠀⠀⠀⠀⠀ Explanation: ➞⠀ $\sf 5(x-3) = 45$ ➞⠀ $\sf x-3=\dfrac{45}{5}$ ➞⠀ $\sf x-3 = 9$ ➞⠀ $\sf x = 9+3$ ➞⠀ $\sf x = 12$ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ (9) (c) 5⠀⠀⠀⠀⠀⠀⠀⠀⠀ Explanation: Sum of 4 consecutive numbers is 26 Let smallest number = x Second number = x + 1 Third number = x + 2 Fourth number = x + 3 According to the question: ➞⠀x + ( x + 1) + (x+2) +(x+3) = 26 ➞⠀4x + 6 = 26 ➞⠀4x = 26-6 ➞⠀4x = 20 ➞⠀x = 20/4 ➞⠀x = 5 Smallest number = x = 5

Answer»

(4) (a) One variable

Explanation:

The given equation contain only one unknown value i.e. x, Apart x, all the values are constant. So, it is an equation in one variable.

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

(5) (b) x = 11⠀⠀⠀⠀⠀⠀⠀⠀⠀

Explanation:

Solution of the equation means : for what value of the variable the equation will be true.

➞⠀ $\sf 3x + 5 = 38$