Advanced Mathematics Primary 6 Algebra

Evaluate the expression 4x + 7 − x + 3 when x = 5.

A 25
B 30
C 23
D 28
Show Worked Solution

Worked Solution

Step 1: Substitute x = 5 into the expression. 4x + 7 − x + 3 becomes 4(5) + 7 − 5 + 3 Step 2: Multiply first. 4(5) = 20 So: 20 + 7 − 5 + 3 Step 3: Add and subtract left to right. 20 + 7 = 27 27 − 5 = 22 22 + 3 = 25 Final answer: 25

Correct answer: 25

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