Solve for x: 3x + 7 = 22
Correct answer: B. 5
- A. 3
- B. 5
- C. 7
- D. 9
Explanation
Subtract 7 from both sides: 3x = 15. Divide both sides by 3: x = 5. Substituting back gives 3(5) + 7 = 22, confirming the answer.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Linear Equations
Linear equations contain variables only to the first power and produce straight-line relationships when represented graphically. Problems involve solving equations with brackets, fractions, and variables on both sides, forming equations from statements, and handling simultaneous linear equations, which differ from quadratic equations by having no squared variable.
Practise Algebra
269 free Algebra MCQs from Mathematics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Mathematics questions like this
Mathematics is on 75 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.