Question

BBSVP Udhampur

BBSVP Udhampur

Topic: Linear equations in one variable

Q1: The value of a in 10+2a=-5+a is:-

15

-15

5

-5

Clear selection

Q2: If 7x-9=12, then x is :

2


Sanchi's age in three times her son's age. Ten years ago she was five times her son's age. Then their present ages:-

60,20

40,10

40,20

45,15



​

Answer 1

Step-by-step explanation:

Q1: The value of a in 10+2a=-5+a is

2a -:a =-5 - 10

a = - 5

Q2: If 7x-9=12, then x is

7x=12 +9

7x = 21

X= 21/7

X =™3

Sanchi's age in three times her son's age. Ten years ago she was five times her son's age. Then their present ages:-

let son age X

sanchi's age = 3 X

10 years ago sanchi's age= 3X -10

sons age = X -10

accordingly sum, (3 X -10) = 5( X -10)

3 X -10= 5 X -50

50-10= 5 X - 3 X

2 X = 40

X = 40/2

X = 20

3 X = 3×20=60

age of Sanchi= 60 years

age of Son = 10 years