Find the point on 3x - y = 7 whose abscissa is -2
Put x = -2 in the equation 3x - y = 7
(3x-2) – y = 7
-6 – y = 7
y = -6 – 7 = -13
The required point is (-2, -13)
Find a point on 6x - 5y = 4 whose ordinate is twice the abscissa. [2 MARKS]
P is a point on the -axis whose ordinate is 8. Q is a point on the line 8 – 3 – 8 = 0 whose abscissa is 4. Calculate the length of PQ.