6.1×5-5x=4.5解方程?
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解:解方程, 此方程的解为x = 26/5,【即x = 5.2】
6.1 × 5 - 5x = 4.5
(6×10+1)/10 × 5 - 5x = (4×10+5)/10
61/10 × 5 - 5x = 45/10
61/2 - 5x = 9/2
5x = 61/2 - 9/2
5x = 52/2
5x = 26
x = 26 ÷ 5
x = 26 × 1/5
x = 26/5
∴x = 5.2
答:此方程的解为x = 26/5,【即x = 5.2】
6.1 × 5 - 5x = 4.5
(6×10+1)/10 × 5 - 5x = (4×10+5)/10
61/10 × 5 - 5x = 45/10
61/2 - 5x = 9/2
5x = 61/2 - 9/2
5x = 52/2
5x = 26
x = 26 ÷ 5
x = 26 × 1/5
x = 26/5
∴x = 5.2
答:此方程的解为x = 26/5,【即x = 5.2】
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