4/5x - ( -x+ 5 ) = -( x - 3 ) - 2/5 ( 2+2x ) simple steps....
0.4- 0.6 (x-3) = 1/3 x - 3/5 ( x- 7) also
Thx
Maths!!!!!!! 10marks
2006-11-05 5:31 am
回答 (1)
2006-11-05 5:39 am
✔ 最佳答案
4/5x - ( -x+ 5 ) = -( x - 3 ) - 2/5 ( 2+2x ) 全式乘 5
4x - 5( -x+ 5 ) = -5( x - 3 ) - 2( 2+2x )
4x + 5x – 25 = -5x + 15 – 4 – 4x
18x = 36
x = 2
0.4- 0.6 (x-3) = 1/3 x - 3/5 ( x- 7)
全式乘15
6 – 9(x – 3) = 5x – 9(x – 7)
6 – 9x + 27 = 5x – 9x + 63
-30 = 5x
x = -6
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