Question

determine by drawing graph whether the following pair of linear equations has a unique solution or not 3x+4y=12:y=2

Answer 1

First, determine any two points on the line 3x+4y=12 by substituting x=0 and y-0, which gives us (0,3) and (4,0). Join these two points in the graph and extend it, to plot the given line. Now draw a line parallel to x axis, passing through (0,2), this is the line y=2. You will observe that they intersect in exactly 1 point, this having a unique solution. 

Answer 2

Step-by-step explanation:

3x +4*2 =12

3x +8=12

3x=12-8

3x=4

x=4/3