Question

Q.14: Solve the following pair of linear equation by substitution method
7x-15y=15, x+2y=3.
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Answer 1

Answer:

Explanation:

7x - 15y = 2 ....eq 1

x + 2y = 3 .....eq2

Multiply eq 2 by 7 and subtract them

-15y - 14y = 2-21

-29y = -19

y = 19/29

Putting value of y in eq 2

x + 2*19/29 = 3

x = 3- 38/29

x= 87/29-38/29

x = 49/29