Math Question by Jake Wang

Level 1

Column A: 3x=2x+9 x=?
Column B: 4x+3= 5x-(63÷9) x=?

Which of the x's are greater ? This is a question that was inspired by one of my friends who wrote a math book, Jake Wang

Column B Column I don't know Column A

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1 solution

Munem Shahriar
Dec 18, 2017

Case 1:

3 x = 2 x + 9 3x=2x+9

⇒ 3 x − 2 x = 9 \Rightarrow 3x-2x =9

∴ x = 9 \therefore x = 9

Case 2:

4 x + 3 = 5 x − ( 63 ÷ 9 ) 4x+3= 5x-(63÷9)

⇒ 4 x + 3 = 5 x − 7 \Rightarrow 4x +3 = 5x-7

⇒ 3 + 7 = 5 x − 4 x \Rightarrow 3+7 = 5x - 4x

∴ x = 10 \therefore x = 10

Hence 10 > 9 10 > 9

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