Answer:
19) solution of the equation
20) y = 3
21) 3,4, and 5
22) A will get 16.5, B will get 8.5
23) Sign
24) 10
25) -60
Step-by-step explanation:
19) Any value of the variable which makes both sides of an equation equal is known as a solution of the equation.
20) 9x – 3 = –21 has the solution (–2) In the question it is given that, x = -2 Then, let us assume the missing number be y (9 × (-2)) – y = -21 -18 – y = -21 – y = -21 + 18 – y = – 3 y = 3
21) The Three consecutive numbers whose sum is 12 are 3 , 4 and 5.
22) Total amount = 25 , Let amount of A = x, let amount of B = y. Given, x = 8 +y ( A get '8' more than B) but x + y = 25 ( Total amount is 25)
⇒ 8 + y + y = 25 ⇒ 2y = 25-8 = 17
⇒ y = 8.5 ⇒ x = 8+8.5 = 16.5
23) A term of an equation can be transposed to the other side by changing its sign.
24) On subtracting 8 from x, the result is 2. The value of x is 10.
25) (x/5) + 30 = 18 has the solution as -60.
Given, (x/5) + 30 = 18
Transposing 30 to RHS and it becomes -30.
(x/5) = 18 – 30
(x/5) = -12
X = -12 × 5
X = -60
