alleryStart learning →Solve: 8y - 9 = 31.
Ay = 5
By = -5
Cy = 40
Dy = 22
Answer & Solution
Correct answer: A. y = 5
1. The left side is the variable side, so the 9 is out of place there.
2. Add 9 to both sides: 8y equals 40.
3. Divide both sides by 8 to get y equals 5.
4. Check: 8 times 5, minus 9, equals 40 minus 9, which equals 31.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 2 "Solving Linear Equations and Inequalities", section 2.3 Solve Equations with Variables and Constants on Both Sides_
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