If 2x + 3y = 18 and y = 2, what is the value of x?
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Correct!
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Correct answer to question 71 (Mathematics Knowledge): 6
Method
Substitute y = 2 to get 2x + 6 = 18, so 2x = 12 and x = 6. The choice 12 is the value of 2x rather than x.
Updated: November 2026
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