5+X-2.25+X=6.6解方程?
2个回答
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解:解方程, 此方程的解为x = 77/40,【即x = 1.925】
5 + X - 2.25 + X = 6.6
500/100 + 2x - (2×100+25)/100 = (6×10+6)/10
500/100 + 2x - 225/100 = 66/10
275/100 + 2x = 660/100
2x = 660/100 - 275/100
2x = 385/100
2x = 77/20
x = 77/20 ÷ 2
x = 77/20 × 1/2
x = 77/40
∴x = 1.925
答:此方程的解为x = 77/40,【即x = 1.925】
5 + X - 2.25 + X = 6.6
500/100 + 2x - (2×100+25)/100 = (6×10+6)/10
500/100 + 2x - 225/100 = 66/10
275/100 + 2x = 660/100
2x = 660/100 - 275/100
2x = 385/100
2x = 77/20
x = 77/20 ÷ 2
x = 77/20 × 1/2
x = 77/40
∴x = 1.925
答:此方程的解为x = 77/40,【即x = 1.925】
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