Solve a two-variable linear system
Systems of linear equations · Stage 2
Recognize the pattern
At an intersection, both equations have the same x and y.
Useful ruleSubstitute or eliminate
Try it before reading the solution
Solve y = x + 2 and y = 2x − 1.
This teaching example is original and is not an official SAT question.
Reasoning
Set x + 2 = 2x − 1, giving x = 3; then y = 5.
Answer(x, y) = (3, 5)
03 · Next step
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Practice questions remain in English, as on the SAT.