Mathematics for IGCSE & O level - Functions (Section 1 - No. 19) | ExamPlay

Mathematics for IGCSE & O level - Functions (Section 1 - No. 19)

If f(x) = 2x - 5, what is the value of x if f(x) = 3?

1

4

9/2

8

Explication

2x - 5 = 3; 2x = 8; x = 4

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