This is the equation of a line in which the slope is 1 and the y-intercept is -4.
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x=4 y=4
y=8 y = 2x y = 2(4) <-- substitute 4 for x y = 8 <-- this is your answer
If x=4... then 'y' MUST equal 3 !
So -3x - 6 = x - 4, ie -2 = 4x so x = -½ and y = -4½
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x=4 y=4
If X+Y=5;X=4, then x=4 and y=1
x=4 y=x+3 y=4+3 y=7
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A pair of simultaneous eq;ns. 3x + y = 4 x + y = 0 Subtract the two eq'ns. This will eliminate 'y' 2x = 4 x = 2 Substitute this value of 'x' into either eq'n for 'y' 2 + y = 0 y = -2 or 3)2) + y = 4 6 + y = 4 y = 4 - 6 y = -2 ( again) . So the answer is ( x,y) = ( 2, -2).
Evaluate x/y when x = 4 and y = 4. x/y = 4/4 = 1/1 = 1
y=-x+4
y=x+4
y=x+4
y equals x plus 4 when y equals 0 then x equals 2i i is the square root of negative 1
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