14点2-2点五x=6点二,怎么解方程?
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解:解方程,此方悔物局程的解为x = 16/5,【即x = 3.2】
14点2 - 2点五x = 6点二
14.2 - 2.5x = 6.2
(14×10+2)/10 - [(2×10+5)/10]x = (6×10+2)/10
142/10 - (25/10)x = 62/10
71/5 - (5/2)x = 31/5
(5/2)x = 71/5 - 31/5
(5/2)x = 40/5
(5/2)x = 8
x = 8 ÷ 5/2
x = 8 × 2/碧让5
x = 16/5
∴x = 3.2
答:此方程蚂漏的解为x = 16/5,【即x = 3.2】
14点2 - 2点五x = 6点二
14.2 - 2.5x = 6.2
(14×10+2)/10 - [(2×10+5)/10]x = (6×10+2)/10
142/10 - (25/10)x = 62/10
71/5 - (5/2)x = 31/5
(5/2)x = 71/5 - 31/5
(5/2)x = 40/5
(5/2)x = 8
x = 8 ÷ 5/2
x = 8 × 2/碧让5
x = 16/5
∴x = 3.2
答:此方程蚂漏的解为x = 16/5,【即x = 3.2】
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