Question by Quoc Tran Anh Le - Discuss with MathYouLike

Quoc Tran Anh Le Coordinator

02/03/2019 at 13:19

If the value of x is 10, what is the value of 3x + 4x + 5x ? Solve in many ways.

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Huy Toàn 8A (TL) 02/03/2019 at 13:29

C1: We have : 3x + 4x + 5x = x (3 + 4 + 5)

Replace x = 10 <=> 10 ( 3 + 4 + 5) = 10 . 12 = 120

C2 : 3x + 4x + 5x <=> 3 . 10 + 4 . 10 + 5 . 10 = 30 + 40 + 50 = 120
Quoc Tran Anh Le selected this answer.

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