21. Solve the following pair of linear equation in two variable using elimination method 4x+8y=7 2x-y=3 By first getting the value of x

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y = 4 x - 7

16 x - 5 y = 25

x + 8 y = 19

2 x + 11 y = 28

x + 8 y = 19

2 x + 11 y = 28

Solve the following pairs of linear (simultaneous) equations using method of elimination by substitution:

$2 x - 3 y = 7$

$5 x + y = 9$

Solve the following pairs of linear (simultaneous) equations using method of elimination by substitution:

$6 x = 7 y + 7$

$7 y - x = 8$

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