5×-6.2+2=8.8怎么解方程?
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解:解方程,此方程的解为x = 13/5,【即x = 2.6】
5x - 6.2 + 2 = 8.8
5x - ( 6×10+2)/10 + 2 = (8×10+8)/10
5x - 62/10 + 2 = 88/10
5x - 31/5 + 2 = 44/5
5x - 31/5 + 10/5 = 44/5
5x - 21/5 = 44/5
5x = 44/5 + 21/5
5x = 65/5
5x = 13
x = 13 ÷ 5
x = 13 × 1/5
x = 13/5
∴x = 2.6
答:此方程的解为x = 13/5,【即x = 2.6】
5x - 6.2 + 2 = 8.8
5x - ( 6×10+2)/10 + 2 = (8×10+8)/10
5x - 62/10 + 2 = 88/10
5x - 31/5 + 2 = 44/5
5x - 31/5 + 10/5 = 44/5
5x - 21/5 = 44/5
5x = 44/5 + 21/5
5x = 65/5
5x = 13
x = 13 ÷ 5
x = 13 × 1/5
x = 13/5
∴x = 2.6
答:此方程的解为x = 13/5,【即x = 2.6】
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