Mathematics for IGCSE & O level - Equations (Section 7 - No. 32)
Which of the following best describes how to solve a system of equations using substitution?
Solve one of the equations for one of the variables.
Substitute the expression found in step one into the other equation.
Solve the remaining equation for the remaining variable.
Graph both equations.
Giải thích
These are the correct steps for substitution.