Question

7. Sachhida spent 13.75 for pencils, 3.50 for an eraser and 4.25 for chocolates. How
much did he spend? with statment​

Answer 1

Step-by-step explanation:

let the cost of a single pencil be Rs x

let the cost of a single eraser be Rs y

let the cost of the sharpener be Rs z

okay so now based on the given Information we can form 2 equations.

3x+5y+7z=49 (1)

5x+8y+11z=78 (2)

subtract 1 from 2

2x+3y+4z=29 (3)

since these equations are linear its easy to solve them by hit and trial.

we can clearly see that putting the following satisfies all the equations above.

put x =2 ,y=3 , z=4

so the cost of 1 pencil 1 eraser and 1 sharpener would be

x+y+z which is 9

answer is Rs 9