Question

5x+3y=9 , 2x-3y=12 by substitution method​

Answer 1

Answer:

x=3 & y = -2

Step-by-step explanation:

equation (1)

5x = 9-3y

x = (9-3y)/5

substituting x in equation in (2)

2((9-3y)/5)-3y = 12

((18-6y)-15y)/5 =12

18-6y-15y= 60

-21y =42

y= -2.

substituting y in equation (1)

5x + (-6) = 9

5x =15

x= 3.

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Answer 2

5x+3y=9 .....1

+ 2x-3y=12...2