KingMathEvaluating an expression
Replace x with a number and calculate.
🔍 Step 1 · Understand
First, look at a worked example
Work out 4x − 7 when x = 2.
💡 The tip : Replace x with 2: 4 × 2 − 7.
🤔 Find the answer in your head, then open the solution.
👀 See the solution✅ The solution
Answer: 1
4 × 2 − 7 = 1.
🎯 Step 2 · Your turn!
10 questions. Take your time, and ask for a hint if you get stuck.