Question

{-4x+5y=6
{7x-3y=1
what is its solution

Answer 1

Answer:

y=23/19 is the correct answer

Answer 2

1] -4x + 5y = 6

[2] 7x - 3y = 1

// Solve equation [2] for the variable x

[2] 7x = 3y + 1

[2] x = 3y/7 + 1/7

// Plug this in for variable x in equation [1]

[1] -4•(3y/7+1/7) + 5y = 6

[1] 23y/7 = 46/7

[1] 23y = 46

// Solve equation [1] for the variable y

[1] 23y = 46

[1] y = 2

// By now we know this much :

x = 3y/7+1/7

y = 2

// Use the y value to solve for x

x = (3/7)(2)+1/7 = 1

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