Problem
If \( x = 2 \) and \( y = 3 \), is the equation \( 2x^2 - 3y + 5 = 7 \) true?
Solution
Step 1 ：First, substitute the given values of \( x \) and \( y \) into the equation, which gives \( 2(2)^2 - 3(3) + 5 = 7 \).
Step 2 ：Then, simplify the equation, which gives \( 2(4) - 9 + 5 = 7 \).
Step 3 ：Further simplification gives \( 8 - 9 + 5 = 7 \).
Step 4 ：Finally, solve the equation, which gives \( 4 = 7 \).
