Substitution: Practice, Quiz

Solve

x + y = 14

and

x - y = 4

.

A

x = 10

,

y = 4

B

x = 8

,

y = 6

C

x = 9

,

y = 5

D

x = 5

,

y = 9

A mother is

28

years older than her son. In

5

years she will be three times as old as he will be. How old is the son now?

A

9

years

B

5

years

C

14

years

D

11

years

3

kg of rice and

1

kg of dal cost ₹

150

;

1

kg of rice and

2

kg of dal cost ₹

100

. What is the cost of

1

kg of rice?

A ₹

50

B ₹

35

C ₹

40

D ₹

30

A two-digit number has digit sum

9

. It exceeds the number with its digits reversed by

45

. Find the number.

A

54

B

27

C

72

D

63

Solve

\displaystyle \dfrac{x}{2} + y = 4

and

\displaystyle x - \dfrac{y}{3} = 1

.

A

x = 3

,

y = 2

B

x = 2

,

y = 3

C

x = 2

,

y = 1

D

x = 4

,

y = 2

Menu

More practice