Question

2x + 3 = 10x - 4x - 9 | Hỏi x = ?

Answer 1

2x + 3 = 10x - 4x - 9

<=> 2x - 10x + 4x = -9 - 3

<=> -4x = -12

<=> x = 3

Answer 2

2x+3=10x-4x-9

(=) 2x-10x+4x=-9-3

(=) -4x=-12

(=) x=-12-(-4)

(=) x=3

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