3.5x+2.6=18.3,怎么解?
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解:解方程,此方程的解为x = 157/35
3.5x + 2.6 = 18.3
[(3×10+5)/10]x + (2×10+6)/10 = (18×10+3)/10
(35/10)x + 26/10 = 183/10
(7/2)x = 183/10 - 26/10
(7/2)x = 157/10
x = 157/10 ÷ 7/2
x = 157/10 × 2/7
∴x = 157/35
答:此方程的解为x = 157/35
3.5x + 2.6 = 18.3
[(3×10+5)/10]x + (2×10+6)/10 = (18×10+3)/10
(35/10)x + 26/10 = 183/10
(7/2)x = 183/10 - 26/10
(7/2)x = 157/10
x = 157/10 ÷ 7/2
x = 157/10 × 2/7
∴x = 157/35
答:此方程的解为x = 157/35
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