Solve 2x + 5 = 17
Undo addition first, then divide by the coefficient of x. Substituting x = 6 recovers the original right-hand side.
Linear Equations solutions
Isolate a first-degree variable and check by substitution.
Solve 3x − 7 = 14
A two-step linear equation: move the constant, then divide. The check is 3(7) − 7 = 14.
Solve x + y = 5 and x − y = 1
Add the two equations to get 2x = 6, so x = 3. Substitute into x + y = 5 to find y = 2.