Algebra Calculator

Type an equation and this calculator reads it the way a person does: left side, equals sign, right side. It splits the input into numbers, letters, and operators, then rebuilds it as a polynomial that stores every coefficient as an exact fraction. That is why one third stays 1/3 and never drifts into 0.3333.

What happens next depends on what you typed. If a variable sits in a denominator, the calculator multiplies both sides by that denominator first and records which values you now have to exclude. It then moves every term to the left so the equation reads "something = 0" and collects like terms.

From there the degree decides the method. A first-degree equation gets divided by the coefficient of the variable. A second-degree equation goes through the quadratic formula, where the discriminant tells you whether you get two clean numbers, one repeated number, a square root that will not cancel, or a complex pair. Cubic and quartic equations rarely factor by hand, so the calculator traces the curve, finds each point where it crosses zero, and narrows every crossing to about six decimal places.

Put two or three equations on separate lines and it switches to elimination instead, clearing one unknown at a time until each variable stands alone.

Every step appears under the answer, so you can compare your own work line by line and spot exactly where a mistake crept in. Nothing is uploaded — the arithmetic runs entirely in your browser.