Question

Solve the following equations by substitution method: 3x-5y=4 9x-2y=7

Answer 1

Answer:

-5/13

Step-by-step explanation:

3x - 5y = 4_-----------1

9x-2y=7 --------2

from 1

3x=4+5y

x=(4+5y)/3 ----------3

therfore substituiting eq 3 in 2

9(4+5y/3)-2y=7

(36+45y)/3 - 2y=7

(36+45y) =3(2y+7)

36 +45y= 6y +21

45y-6y= 21-36

39y= -15

y= -15/39

= -5/13

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