Question

19. A pet shop owner bought 320 leashes. 30% of these leashes were pink leashes and the rest were blue and green leashes. The number of blue leashes is 3 times the number of green leashes. How many blue leashes did she buy?

Answer 1

The number of the blue leashes will be 240.

What are linear equations?

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

It is given that:-

• A pet shop owner bought 320 leashes. 30% of these leashes were pink leashes and the rest were blue and green leashes.
• The number of blue leashes is 3 times the number of green leashes.

The number of the blue leashes will be calculated as:-

L     =    320

B   +    P   +   g   =   320

{ (320  x   0.3 ) } + 0.7 ( B  +  g ) =  320

( 96 )  +   ( 2.8g )   =   320

2.8g   =   320 / 96

g   =   222  /  2.8  =  80

Now  B  =   3  x  g

B   =   3   x   80

B   =   240

Therefore the number of the blue leashes will be 240.

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