6 resources.
How to solve a one-variable linear equation, including fractional coefficients, with worked examples translating word problems into equations.
How to solve a system of linear equations using the matrix method, with a fully worked three-variable example.
Turning a word problem into a pair of linear equations, and checking whether two lines intersect, are parallel, or coincide by comparing coefficient ratios.
Solving a pair of linear equations by substitution and by elimination, including recognizing when a system has infinitely many solutions.
The cross-multiplication formula for solving a pair of linear equations, and reducing an equation that isn't linear yet into one that is, with worked examples.
Translating age and money word problems into a pair of linear equations and solving them, including a classic problem with two valid cases.