Question

multiple-choice question
what is the next step?
graph the equation on a coordinate grid.
substitute the expression he just found into one of the equations.
solve the other equation for x.
rewatch
submit

Explanation:

In solving a system of equations (likely via substitution method), after finding an expression (e.g., solving for one variable), the next logical step is to substitute that expression into one of the original equations to solve for the other variable. Graphing is a different method, and solving the other equation for \( x \) would be a step before substitution, not after finding an expression. So the correct next step is to substitute the found expression into one of the equations.

Answer:

B. Substitute the expression he just found into one of the equations.