(D) Communicate mathematical ideas, reasoning, and their implications using multiple representations, including symbols, diagrams, graphs, and language as appropriateA1.3.F
(F) Graph systems of two linear equations in two variables on the coordinate plane and determine the solutions if they existA1.5.A
(A) Solve linear equations in one variable, including those for which the application of the distributive property is necessary and for which variables are included on both sides
(Y8) Solve linear equations using algebraic and graphical techniques. Verify solutions by substitution (ACMNA194)ACMNA237
(Y10) Solve linear simultaneous equations, using algebraic and graphical techniques, including using digital technology (ACMNA237)
8.EE.7 Solve linear equations in one variable.8.EE.7.A
8.EE.7.A Give examples of linear equations in one variable with one solution, infinitely many solutions, or no solutions. Show which of these possibilities is the case by successively transforming the given equation into simpler forms, until an equivalent equation of the form x = a, a = a, or a = b results (where a and b are different numbers).