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SAT - Math - Algebra

x + y = -9; x + 2y = -25 According to the system of equations above, what is the value of x?

x y = -9;

x 2y = -25

According to the system of equations above, what is the value of x?

x + y = -9 ... (1)

x + 2y = -25 ... (2)

2* equation 1 - equation 2

2x + 2y - x - 2y = -18 + 25

x = 7