-8(x-2)=4-7x
2(x-4)/-3(x+3)=-3
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Maths問題!!!!
2008-07-07 6:58 pm
回答 (4)
2008-07-17 2:41 am
-8(x-2)=4-7x
-8x+16=4-7x
16-4=-7x+8x
12=x
2(x-4)/-3(x+3)=-3
2x-8/-3x-9=-3
2x-8=-3(-3x-9)
2x-8=9x+27
-8-27=9x-2x
-35=7x
x=-5
-8x+16=4-7x
16-4=-7x+8x
12=x
2(x-4)/-3(x+3)=-3
2x-8/-3x-9=-3
2x-8=-3(-3x-9)
2x-8=9x+27
-8-27=9x-2x
-35=7x
x=-5
參考: myself
2008-07-08 1:00 am
2008-07-07 9:41 pm
001 答案第三行：
應是：2(x-4) = -3(-3x-9)
而不是：2(x-4) = -3-(-3x-9)
應是：2(x-4) = -3(-3x-9)
而不是：2(x-4) = -3-(-3x-9)
2008-07-07 7:15 pm
2(x-4)/-3(x+3)=-3
2(x-4) = -3(-3(x+3))
2(x-4) = -3-(-3x-9)
2(x-4) = 9x+27
2x-8 = 9x+27
2x-9x = 27+8
-7x = 35
x = 35/-7
x = -5
-8(x-2) = 4-7x
-8x+16 = 4-7x
16-4 = -7x+8x
12 = x
x = 12
2(x-4) = -3(-3(x+3))
2(x-4) = -3-(-3x-9)
2(x-4) = 9x+27
2x-8 = 9x+27
2x-9x = 27+8
-7x = 35
x = 35/-7
x = -5
-8(x-2) = 4-7x
-8x+16 = 4-7x
16-4 = -7x+8x
12 = x
x = 12
參考: 自己
收錄日期: 2021-04-23 23:05:41
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