解方程(4x+8)×0.7=10.05怎么做?
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解:解方程,此方程的解为x = 89/56
(4x + 8) × 0.7 = 10.05
4x + 8 = 10.05 ÷ 0.7
4x + 8 = (10×100+5)/100 ÷ 7/10
4x + 8 = 1005/100 × 10/7
4x + 8 = 1005/70
4x = 1005/70 - 8
4x = 1005/70 - 560/70
4x = 445/70
x = 445/70 ÷ 4
x = 445/70 × 1/4
∴x = 89/56
答:此方程的解为x = 89/56
(4x + 8) × 0.7 = 10.05
4x + 8 = 10.05 ÷ 0.7
4x + 8 = (10×100+5)/100 ÷ 7/10
4x + 8 = 1005/100 × 10/7
4x + 8 = 1005/70
4x = 1005/70 - 8
4x = 1005/70 - 560/70
4x = 445/70
x = 445/70 ÷ 4
x = 445/70 × 1/4
∴x = 89/56
答:此方程的解为x = 89/56
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