Question

2x - 3y = 13 7x - 2 = 20 by substitution method

Answer 1

Answer:

y = -51/19

x = 47/19

Step-by-step explanation:

2x -3y = 13 .....(i)

7x - 2y = 20 .....(ii)

Taking (i)

2x - 3y = 13

2x = 13 + 3y

x = (13 +3y)/2 ......(iii)

Putting (iii) in (ii)

7x - 2y = 20

7[(13 + 3y)/2] - 2y = 20

91 + 21y - 4y = 40

91 - 40 = -19y

y = -51/19

putting y in (i)

2x + 153/19 =13

38x + 153 = 247

38x = 94

x = 94/38

x= 47/19

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