Question

2x – 3y = 13 , 7x – 3y = 8 By Substitution Method

Answer 1

x = 13.1 and y=4.4

Step by Step Explanation :

7x-3y=8 -eq.n 1

2x-3y=13 -eq.n 2

2x=13-3y

x=(13+3y)/2

x=26+6y eq.n 3

putting this value in eq.n 1

7{26+6y} - 3y = 8

182+42y - 3y = 8

39y = 8-182

39y = 172

y = 172/39

y=4.4 eq.n 4

putting this value in eq.n 2

2x-3y = 13

2x-3(4.4) = 13

2x-13.2 = 13

2x = 13+13.2

2x = 26.2

x = 26.2/2

x = 13.1

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