數學...
2017/06/21 01:00
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標題:
發問:
方程式... 方程式: b ×45%=36 7(d-6.8)=10.5 55% ×(n-6)=27.5 (q-6.7) ×3.8=8.36 2.55u+8.44=88.51 (w+1.6) ÷12%=15 (f-7.5)×25%=18 步驟+答案 please!
最佳解答:
b x 45% = 36 b x 45/100 = 36 b = 36 x 100/45 = 90 7(d - 6.8) = 10.5 d - 6.8 = 10.5 / 7 = 1.5 d = 1.5 + 6.8 = 8.3 55% x (n - 6) = 27.5 (n - 6) x 55/100 = 27.5 n - 6 = 27.5 x 100 / 55 = 50 n = 50 + 6 = 56 2.55u + 8.44 = 88.51 2.55u = 88.51 - 8.44 = 80.07 u = 80.07 / 2.55 = 31.4 (w + 1.6) ÷ 12% = 15 (w + 1.6) ÷ 12/100 = 15 (w + 1.6) x 100/12 = 15 w + 1.6 = 15 x 12 /100 = 1.8 w = 1.8 - 1.6 = 0.2 (f - 7.5) x 25% = 18 (f - 7.5) X 25/100 = 18 f -7.5 = 18 x 100 / 25 = 72 f = 72 + 7.5 = 79.5
其他解答:
b ×45%=36 b=36×100/45 b=80 7(d-6.8)=10.5 7d-47.6=10.5 7d=10.5+47.6 7d=58.1 d=8.3 55% ×(n-6)=27.5 n-6=27.5x100/55 n-6=50 n=50+6 n=56 (q-6.7) ×3.8=8.36 (q-6.7)=8.36/3.8 q-6.7=2.2 q=2.2+6.7 q=8.9 2.55u+8.44=88.51 2.55u=88.51-8.44 2.55u=80.07 u=80.07/2.55 u=31.4 (w+1.6) ÷12%=15 w+1.6=15x12/100 w+1.6=1.8 w=1.8-1.6 w=0.2 (f-7.5)×25%=18 f-7.5=18x100/25 f-7.5=72 f=72+7.5 f=79.5|||||其實你這些數不是太難，你應該自己計。 b ×45%=36 b=36x100/45 b=80 7(d-6.8)=10.5 b-6.8=10.5/7 b=1.5+6.8 b=8.3 55% ×(n-6)=27.5 n-6=27.5x100/55 n=30+6 n=36 (q-6.7) ×3.8=8.36 q-6.7=8.36/3.8 q=2.2+6.7 q=8.9 2.55u+8.44=88.51 2.55u=88.51-8.44 u=80.07/2.55 u=31.4 (w+1.6) ÷12%=15 w+1.6=15x12% w=27-1.6 w=25.4 (f-7.5)×25%=18 f-7.5=18/25% f=4+7.5 f=11.5
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數學...發問:
方程式... 方程式: b ×45%=36 7(d-6.8)=10.5 55% ×(n-6)=27.5 (q-6.7) ×3.8=8.36 2.55u+8.44=88.51 (w+1.6) ÷12%=15 (f-7.5)×25%=18 步驟+答案 please!
最佳解答:
b x 45% = 36 b x 45/100 = 36 b = 36 x 100/45 = 90 7(d - 6.8) = 10.5 d - 6.8 = 10.5 / 7 = 1.5 d = 1.5 + 6.8 = 8.3 55% x (n - 6) = 27.5 (n - 6) x 55/100 = 27.5 n - 6 = 27.5 x 100 / 55 = 50 n = 50 + 6 = 56 2.55u + 8.44 = 88.51 2.55u = 88.51 - 8.44 = 80.07 u = 80.07 / 2.55 = 31.4 (w + 1.6) ÷ 12% = 15 (w + 1.6) ÷ 12/100 = 15 (w + 1.6) x 100/12 = 15 w + 1.6 = 15 x 12 /100 = 1.8 w = 1.8 - 1.6 = 0.2 (f - 7.5) x 25% = 18 (f - 7.5) X 25/100 = 18 f -7.5 = 18 x 100 / 25 = 72 f = 72 + 7.5 = 79.5
其他解答:
b ×45%=36 b=36×100/45 b=80 7(d-6.8)=10.5 7d-47.6=10.5 7d=10.5+47.6 7d=58.1 d=8.3 55% ×(n-6)=27.5 n-6=27.5x100/55 n-6=50 n=50+6 n=56 (q-6.7) ×3.8=8.36 (q-6.7)=8.36/3.8 q-6.7=2.2 q=2.2+6.7 q=8.9 2.55u+8.44=88.51 2.55u=88.51-8.44 2.55u=80.07 u=80.07/2.55 u=31.4 (w+1.6) ÷12%=15 w+1.6=15x12/100 w+1.6=1.8 w=1.8-1.6 w=0.2 (f-7.5)×25%=18 f-7.5=18x100/25 f-7.5=72 f=72+7.5 f=79.5|||||其實你這些數不是太難，你應該自己計。 b ×45%=36 b=36x100/45 b=80 7(d-6.8)=10.5 b-6.8=10.5/7 b=1.5+6.8 b=8.3 55% ×(n-6)=27.5 n-6=27.5x100/55 n=30+6 n=36 (q-6.7) ×3.8=8.36 q-6.7=8.36/3.8 q=2.2+6.7 q=8.9 2.55u+8.44=88.51 2.55u=88.51-8.44 u=80.07/2.55 u=31.4 (w+1.6) ÷12%=15 w+1.6=15x12% w=27-1.6 w=25.4 (f-7.5)×25%=18 f-7.5=18/25% f=4+7.5 f=11.5
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