Which of the following is a system of linear equations in two variables?
a. 2x – 7y = 8
b. {3x+5y= -2 x-4y=9
c. {x+9y= 2 2x-3>12
d. 4x + 1 =18
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Which of the following is a system of linear equations in two variables?
a. 2x – 7y = 8
b. {3x+5y= -2 x-4y=9
c. {x+9y= 2 2x-3>12
d. 4x + 1 =18
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