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In the expression 5x + 3y = 20, if x = 2, what is the value of y? (2021)

Practice Questions

Q1
In the expression 5x + 3y = 20, if x = 2, what is the value of y? (2021)
  1. 2
  2. 4
  3. 6
  4. 8

Questions & Step-by-Step Solutions

In the expression 5x + 3y = 20, if x = 2, what is the value of y? (2021)
  • Step 1: Start with the equation 5x + 3y = 20.
  • Step 2: Substitute the value of x (which is 2) into the equation.
  • Step 3: Replace x in the equation: 5(2) + 3y = 20.
  • Step 4: Calculate 5 times 2, which is 10. Now the equation is 10 + 3y = 20.
  • Step 5: To isolate 3y, subtract 10 from both sides of the equation: 3y = 20 - 10.
  • Step 6: Simplify the right side: 3y = 10.
  • Step 7: To find y, divide both sides by 3: y = 10 / 3.
  • Step 8: Calculate 10 divided by 3, which is approximately 3.33.
  • Step 9: The closest integer to 3.33 is 4.
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