What is an Equation?

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$7–\mathrm{x}=5$

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$20\mathrm{}–(10\mathrm{}–5)=3\times 5$
 

State whether the following are equations (with a variable) or not. Give reason for your answer. Identify the variable from the equations with a variable.

 $\mathrm{z}+12>24$

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$\frac{3q}{2}<5$
 

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$20\mathrm{}=\mathrm{}5\mathrm{y}$
 

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$7=(11\times 2)+\mathrm{p}$
 

State whether the following are equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$7=(11\times 5)\mathrm{}–(12\times 4)$

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$2\mathrm{n}+1=11$
 

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$2\mathrm{m}<30$
 

State whether the following is equation or not (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
$\mathrm{x}\mathrm{}–2=0$

State whether the following is equation (with a variable) or not. Give reason for your answer. Identify the variable from the equation with a variable.

$5\times 4\mathrm{}–8=2\mathrm{}\mathrm{x}$

State whether the following is an equation(with a variable) or not. Give reason for your answer. Identify the variable from the equation with a variable.
$\frac{4}{2}=2$
 

State whether the following is an equation(with a variable) or not. Give reason for your answer. Identify the variable from the equation with a variable.
$(7\times 3)\mathrm{}–19=8$
 

State whether the following is an equation (with a variable). Give reason for your answer. Identify the variable from the equation with a variable.
 $(\mathrm{t}\mathrm{}–7)>5$
 

State whether the following is an equation (with a variable). Give reason for your answer. Identify the variable from the equations with a variable.
$17=\mathrm{x}+7$