6題方程式(F.1) 20點呀 @ wszspj2的部落格

標題:

6題方程式(F.1) 20點呀

發問:

1. 3[4(2.5-q)+1] = 13-2q 2. 2[p-2(p+1)]-1 = 8p + 25 3. 1.3x - 7 = 2.5x - 1 4. 4n - 11 - 8n = 22 - n 5. 8(y-0.3) = 1+ 2(0.3y + 2) 6. h-[2(h-1)+10] = 5(h-34)

最佳解答:

1. 3[4(2.5-q) 1] = 13-2q 3(10-4q 1)=13-2q 33-12q=13-2q 20=10q q=2 2. 2[p-2(p 1)]-1 = 8p 25 2(p-2p-2)-1=8p 25 2p-4p-4-1=8p 25 -2p-5=8p 25 -30=10p p=-3 3. 1.3x - 7 = 2.5x - 1 -6=1.2x -5=x x=-5 4. 4n - 11 - 8n = 22 - n -11-22=-n-4n 8n -33=3n n=-11 5. 8(y-0.3) = 1 2(0.3y 2) 8y-2.4=1 0.6y 4 7.4y=7.4 y=1 6. h-[2(h-1)+10] = 5(h-34) h-(2h-2+10=5h-170 -h-8=5h-170 162=6h h=27 2008-10-11 17:04:54 補充： 5. 8(y-0.3) = 1+2(0.3y+2) 8y-2.4=1+ 0.6y +4 7.4y=7.4 y=1

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