Question

how do you know that substitution gives the answer to a system of equations? Ten exlpain

Answer 1

Solving equations through a system is the simplest way to figure out an equation. The method of substitution allows for you to solve an equation for one variable such as x, and adding that variable into another equation. To know that substitution gives the answer to a system of equations you will simply need to substitute a variable, and apply that number to the variable equation.