The most basic and common algebraic equations in math consist of one or more variables. If a 0 then the equation is linear not quadratic as there is no ax² term. You may also want to practice with some basic algebra worksheets.
Basic algebra is the field of mathematics that it one step more abstract than arithmetic.
There is this notion that algebra is the hardest course in mathematics. You may also want to practice with some basic algebra worksheets. Some examples can fracti. 3 4 5 3.