Question

Solve the simultaneous equations: 2x+3y=7 7x-y=13 I want explanations The answers in the back of the book are : x=2,y=1 I want explanations

Answer 1

Answer:

x=2

y=1

Step-by-step explanation:

2x+3y=7       ........(1)

7x-y=13

=>y=7x-13     ..........(2)

putting value of y in from (2) in (1), we get

2x+3(7x-13)=7

=>2x+21x-39=7

=>23x=46

=>x=2

=>y=7x-13

     =14-13=1

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