18—5x=16.375怎样解方程?
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解:解方程, 此方程的解为x = 13/40,【即x = 0.325】
18—5x=16.375
5x = 18 - 16.375
5x = 18 - (16×1000+375)/1000
5x = 18000/1000 - 16375/1000
5x = 1625/1000
5x = 13/8
x = 13/8 ÷ 5
x = 13/8 × 1/5
x = 13/40
∴x = 0.325
答:此方程的解为x = 13/40,【即x = 0.325】
18—5x=16.375
5x = 18 - 16.375
5x = 18 - (16×1000+375)/1000
5x = 18000/1000 - 16375/1000
5x = 1625/1000
5x = 13/8
x = 13/8 ÷ 5
x = 13/8 × 1/5
x = 13/40
∴x = 0.325
答:此方程的解为x = 13/40,【即x = 0.325】
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