a) 1.4x -0.64 = 0.2
its same like given y=1.4x-0.62
means that y=0.2
find a point on the line with y-coordinate 0.2. i think x-coordinate of this point is 0.6.
means that x = 0.6
b) -1.2=1.4x - 0.64
here y = -1.2
find on the line point with y-coordinate -1.2 and tell what is it's x-coordinate. thats' the answer.