The equations in this system were added to solve for x. What is the value of x? the 3 by 1 matrix row 1, negative 8 x plus 8 y equals 8 row 2, 3 x minus 8 y equals negative 18 over horizontal bar row 3, negative 5 x equals negative 10
A
x is equal to negative 1 halfB
x is equal to negative 2Add the two equations: (−8x + 8y) + (3x − 8y) = 8 + (−18). The y-terms cancel, leaving −5x = −10. Dividing both sides by −5 gives x = 2, which is choice D.
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