Question

11. On selling a chair for 720. a man gains 20%. The cost price of the chair is
(a) 864
(b) 576
(c) 650
(d) 600
12. On selling a stool for 630, a man loses 10%. The cost price of the chair is​

Answer 1

Step-by-step explanation:

9th

Maths

Linear Equations in Two Variable

Solution of Linear Equations in Two Variables

Solve the following simulta...

MATHS

Solve the following simultaneous equations by method of elimination.

a+b=6

a−b=4

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VIDEO EXPLANATION

ANSWER

a+b=6 .......... (i)

a−b=4 Adding .......... (ii)

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2a=10

a=

2

10

=5

Put the value a in the equation (i), we get

5+b=6

∴b=6−5

∴b=1