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Solve this faster with the right shortcut first
Shortcut used: Define the variable, form the equation, then solve step by step.
Solve in 3 steps:
- Let the unknown be a variable.
- Translate the statement into an equation.
- Solve and verify in options.
Common mistake: Do not change signs while moving terms across the equation.
Question 6
Multiple Choice Question
Question
If x + y = 19 and x - y = 7, what is the value of x?
Explanation
Correct Answer: C
ANSWER
Correct Answer: C
Method / Topic: Algebra
The value of x is 13.
Why this answer is correct
The answer satisfies the equation formed from the question.
Short Explanation
The value of x is 13.
Detailed Explanation
Question
If x + y = 19 and x - y = 7, what is the value of x?
ANSWER
Correct Answer: C
Method / Topic: Algebra
Add the equations: 2x=26. Therefore, x=13.
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Question 6
Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Learn + solve
Shortcut used, common trap, and the fastest solving route
Shortcut used: Define the variable, form the equation, then solve step by step.
Solve in 3 steps:
- Let the unknown be a variable.
- Translate the statement into an equation.
- Solve and verify in options.
Common mistake: Do not change signs while moving terms across the equation.
Question
If x + y = 19 and x - y = 7, what is the value of x?
Explanation
Correct Answer: C
ANSWER
Correct Answer: C
Method / Topic: Algebra
The value of x is 13.
Why this answer is correct
The answer satisfies the equation formed from the question.
Short Explanation
The value of x is 13.
Detailed Explanation
Question
If x + y = 19 and x - y = 7, what is the value of x?
ANSWER
Correct Answer: C
Method / Topic: Algebra
Add the equations: 2x=26. Therefore, x=13.
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