3*-7=29
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A system of equations is two or more equations that share at least one variable. Once you have determined your equations, solve for one of the variables and substitute in that solution to the other equation.
Elimination and substitution are two methods.
what is the formula to use to solve the product of two consecutive odd integers
Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.
Rene Descates discovered it in the 17th century