Question

There are some rs50 and rs20 notes in a purse. Number of rs50 notes is 7 less than rs20 notes . The total amount of money is rs560. Find the number of rs20 and rs50 notes .....( linear equation in one variable) ​

Answer 1

Step-by-step explanation:

let the no of rs 50be x

and 20be x+7

so

50x+20(x+7)=560

50x+20x+140

70x+140=560

x=560-140/70

x=6

no of 50rs=6

no of 20rs=6+7=13

Answer 2

Answer:

6 and 13

Step-by-step explanation:

let no of 50 rupees notes be x.

so no of 20 rupees notes=x+7.

total amount of money=50x+20(x+7).

also total money. =rs. 560

so the eqn. becomes

50x+20(x+7)=560

50x+20x+140=560

70x=560-140

70x=420

×=6

no of 50 rs. notes =6

no of 20 rs. notes=6+7=13