解:解方程, 此方程的解为x = 107/25,【即x = 4.28】
(5x减七)除以三等于4.8
(5x - 7)÷ 3 = 4.8
(5x - 7)÷ 3 = (4×10+8)/10
(5x - 7)÷ 3 = 48/10
(5x - 7)÷ 3 = 24/5
5x - 7 = 24/5 × 3
5x - 7 = 72/5
5x = 72/5 + 7
5x = 72/5 + 35/5
5x = 107/5
x = 107/5 ÷ 5
x = 107/5 × 1/5
x = 107/25
∴x = 4.28
答:此方程的解为x = 107/25,【即x = 4.28】
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