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If 5x + 2y = 20 and y = 2, what is the value of x?

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Question: If 5x + 2y = 20 and y = 2, what is the value of x?

Options:

  1. 2
  2. 3
  3. 4
  4. 5

Correct Answer: 4

Solution: 

Substitute y = 2 into 5x + 2(2) = 20. This gives 5x + 4 = 20. Subtract 4: 5x = 16. Divide by 5: x = 16/5 = 3.2.

If 5x + 2y = 20 and y = 2, what is the value of x?

Practice Questions

Q1
If 5x + 2y = 20 and y = 2, what is the value of x?
  1. 2
  2. 3
  3. 4
  4. 5

Questions & Step-by-Step Solutions

If 5x + 2y = 20 and y = 2, what is the value of x?
  • Substitution in Linear Equations – The process of replacing a variable in an equation with a given value to solve for another variable.
  • Algebraic Manipulation – The skills required to rearrange and simplify equations to isolate variables.
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