Solving Equations

An equation is a mathematical statement that asserts the equality of two expressions, typically containing variables.

To solve an equation means to find the value(s) of the variable(s) that make the equation true.

Subtract 4 from both sides to isolate the term with the variable.

The solution is $$x = 7$$ .

Isolating the variable helps to simplify the equation and makes it easier to find the solution.

The equation is $$y = 90x + 50$$ , where y is the total charge and x is the number of hours.

Subtract 11 from both sides.

It means to maintain the equality of the equation by performing the same operation on both sides.

The solution is $$n = -5$$ .

A variable is a symbol, often a letter, that represents an unknown value in an equation.