Problem
CONSTRUCT AN ARGUMENT A student said that for $x-7=-15$, the value of $x$ can be any value. Is the student correct? Write an argument that can be used to defend your response. 7. Give an example of an addition equation and a subtraction equation that each have a solution of 10 .
Solution
Step 1 ：The student's claim is incorrect. Solve the equation: \(x - 7 = -15\)
Step 2 ：Add 7 to both sides: \(x = -8\)
Step 3 ：\boxed{x = -8} is the unique solution.
Step 4 ：An addition equation with a solution of 10: \(3 + 7 = 10\)
Step 5 ：A subtraction equation with a solution of 10: \(15 - 5 = 10\)
