Solve two-step equations and justify each inverse operation.
Solve a two-step equation with a constant and coefficient
Problem
Solve \(3x~+~5~=~20\).
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What this problem is really about
Undo the operations in reverse order from how the expression is built. First remove the constant added after the multiplication, using the same subtraction on both sides. Once the variable term stands alone, divide by its coefficient, then check by rebuilding the original left side.
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