Solve a linear equation
Linear equations and formulas · Stage 1
Recognize the pattern
Undo addition, then multiplication, while keeping both sides equal.
Useful ruleax+b=c
Try it before reading the solution
Solve 3x + 5 = 20.
This teaching example is original and is not an official SAT question.
Reasoning
Subtract 5: 3x = 15. Divide by 3: x = 5.
Answerx = 5
03 · Next step
See membership →Ready for adaptive practice
Practice questions remain in English, as on the SAT.