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divathaonhi
2 năm trước
Bài 2: Tìm x biếta) x +7 1115 20 b)1 1 13 x .1 12 4 20     c) 1 3.x + . x 2 32 5 d)11 3 1.x + 12 4 6 e)1 2 23 x .6 3 3     f) 8x – 4x = 1208g)0,3.x+0,6.x 9h)1 2 18x + x2 5 25i)2 1 3 1x + 3 2 10 5 k)2 1 1 : x 3 3 2 l) 2x+ 4.2x= 5 m) ( x + 2 )5= 210n ) 1 + 2 + 3 + … + x = 78 o) ( 3x – 4 ) . ( x – 1 )3= 0
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