Question

Pick out the solution from the values given in the bracket next to each equation. Show that the other values do not satisfy the equation.

x + 4 = 2 (− 2, 0, 2, 4)

Answer 1

x + 4 = 2 

x = −2 is a solution to the given equation because for x = −2,

x + 4 = −2 + 4 = 2 and hence, the equation is satisfied.

x = 0 is not a solution to the given equation because for x = 0,

x + 4 = 0 + 4 = 4 and not 2

x = 2 is not a solution to the given equation because for x = 2,

x + 4 = 2 + 4 = 6 and not 2

x = 4 is not a solution to the given equation because for x = 4,

x + 4 = 4 + 4 = 8 and not 2