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2x - 7y = 8
3x - 4y = -1 multiply the first equation by -3, and the second one by 2
-6x + 21y = -24
6x - 8y = -2 add boyh equations
13y = -26 divide by 13 to both sides
y = -2 substitute -2 for y in the first equation
2x - 7(-2) = 8
2x + 14 = 8 subtract 14 to both sides
2x = -6 divide by 2 to both sides
x = -3
Thus the solution is (-3, -2).
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If x equals -8 and xy equals 1 then what does y equal?
-1/8 -8*-1/8 = 1
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8+1 equals 9
A equals 6 and b equals 8 so what does c equal?
It equals 10.5 A = 6 B = 8 which is 6+1/3 of 6 C = 10.5 which is 8+1/3 of 8
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negative 8 over negative 8 equals 1 (anything over itself equals to 1)
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