4.2x-0.6×0.6=8.05
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解:解方程,此方程的解为x = 841/420
4.2x - 0.6 × 0.6 = 8.05
[(4×10+2)/10]x - 6/10 × 6/10 = (8×100+5)/100
(42/10)x - 3/5 × 3/5 = 805/100
(21/5)x - 9/25 = 161/20
(21/5)x = 161/20 + 9/25
(21/5)x = 805/100 + 36/100
(21/5)x = 841/100
x = 841/100 ÷ 21/5
x = 841/100 × 5/21
x = 841/420
答:此方程的解为x = 841/420
4.2x - 0.6 × 0.6 = 8.05
[(4×10+2)/10]x - 6/10 × 6/10 = (8×100+5)/100
(42/10)x - 3/5 × 3/5 = 805/100
(21/5)x - 9/25 = 161/20
(21/5)x = 161/20 + 9/25
(21/5)x = 805/100 + 36/100
(21/5)x = 841/100
x = 841/100 ÷ 21/5
x = 841/100 × 5/21
x = 841/420
答:此方程的解为x = 841/420
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4.2x-0.6×0.6=8.05
解:4.2x-0.36=8.05
4.2x=8.05+0.36
4.2x=8.41
x=8.41÷4.2
x≈2
解:4.2x-0.36=8.05
4.2x=8.05+0.36
4.2x=8.41
x=8.41÷4.2
x≈2
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2018-12-18 · 知道合伙人教育行家
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4.2x-0.6×0.6=8.05
解:4.2x-0.36=8.05
4.2x=8.41
x=8.41÷4.2
x=841/420
解:4.2x-0.36=8.05
4.2x=8.41
x=8.41÷4.2
x=841/420
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2018-12-18
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4.2x =8.41
x =420分之841
x =420分之841
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