Question

5. Divide 25 into two parts such that 7 times the first part added to 5 times the second part makes
139​

Answer 1

Answer:

first part =7,second part=18

Step-by-step explanation:

let the first part be x

let the second part be y

x+y=25 (1)

7x+5y=139 (2)

Solving both the eq's,we get:

x+y=25 (×5)

7x+5y=139 (×1)

5x+5y=125

7x+5y=139

___________

-2x=-14

2x=14

x=7

put the value of x in eq (1)

x+y=25

7+y=25

y=25-7

y=18