Solve one-step equations and interpret the solution in context.
Undo addition or subtraction in one step
Problem
Solve the equation: \(x~+~7~=~12\). What is \(x\)?
Big Picture
What this problem is really about
View the equation as a balanced statement with seven added to the unknown. Isolate the unknown by undoing that addition, and perform the same subtraction on both sides so the balance is preserved. Substituting the resulting value into the original equation provides a direct check.
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