Question

solve the pairs of equations any method
9x +4y=24
x-y=7​

Answer 1

by substitution method

x = 7+y

9 ( 7+ y) + 4y = 24

63 + 9y + 4y = 24

13y = 24 - 63

13y = -39

y = -39/ 13

y = -3

value of x = 7 + y

x = 7-3 = 4

Answer 2

$\huge \star \underline\pink{answer}$

Method used - substitution method

x-y=7

x= 7+y -------1

9x+4y=24

9(7+y)+4y= 24

63+9y+4y=24

13y= 24-63

= 13y= -39

y= 2

x-2= 7

x= 9

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