There can be all sorts of equations for a solution such as 27.
Some examples would be:
x + 10 = 37
x2 = 729
x - 10 = 17
where x = 27, in all equations.
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It is the unknown variable
You find, or construct, an equation or set of equations which express the unknown variable in terms of other variables. Then you solve the equation(s), using algebra.You find, or construct, an equation or set of equations which express the unknown variable in terms of other variables. Then you solve the equation(s), using algebra.You find, or construct, an equation or set of equations which express the unknown variable in terms of other variables. Then you solve the equation(s), using algebra.You find, or construct, an equation or set of equations which express the unknown variable in terms of other variables. Then you solve the equation(s), using algebra.
n usually represents and unknown variable
You don't use unknown variables to solve an equation. The purpose of solving an equation is to find the value of the variable so that it's no longer unknown.
It could represent an unknown variable in an expression or an equation.