Question

1. Solve the equation 4x + 6 = 1 + 3 graphically.

Answer 1

Notice that the equation given:

4 x + 6 = x + 3

has been represented on the plane by graphing the lines:

y = 4 x + 6, and y = x + 3

and looked for the point at which they intersect.

That point is marked in blue, and we can read its coordinates:

x = -1 and y = 2

so the value for x is -1.

Then we say that the equation 4 x + 6 = x + 3 has for solution x = -1.