+23-(-20)=43 how is that so?Explanation included
1 answer:
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The solution to the system of equations is (x, y) = (10, 14), where x is the number of 3-point questions and y is the number of 5-point questions. The appropriate choice is ...
The test contains 10 three-point questions and 14 five-point questions. (2nd selection)
The test contains 10 three-point questions and 14 five-point questions. (2nd selection)
Solution:
Given equation is .
To solve the equation by step by step.
Step 1: Given
Step 2: Combine like terms together.
Plus symbol changed to minus when the term goes from right to left (or) left to right of the equal sign.
Step 3: Subtract the fractions in the left side.
⇒
Step 4: Divide both side of the equation by 3, we get
Hence, the answer is .