Fill in the Blank with One of the Words or Phrases

Multiple Choice

Fill in the blank with one of the words or phrases listed below. $$\begin{array} { l l l } \text { contradiction } & \text { linear inequality in one variable compound inequalitysolution } \\\text { absolute value } & \text { consecutive integers union } \\\text { formula } & \text { linear equation in one variable intersection }\end{array}$$
-When a variable in an equation is replaced by a number and the resulting equation is true, then that number is called a(n) _____ of the equation.

A) solution
B) contradiction
C) union
D) identity