5.2×3-4x=10.8怎么解?
2个回答
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解:此方程的解为x = 6/5,【即等于1.2】
5.2 × 3 - 4x = 10.8
(5×10+2)/10 × 3 - 4x = (10×10+8)/10
52/10 × 3 - 4x = 108/10
26/5 × 3 - 4x = 54/5
78/5 - 4x = 54/5
4x = 78/5 - 54/5
4x = 24/5
x = 24/5 ÷ 4
x = 24/5 × 1/4
x = 6/5
∴x = 1.2
答:此方程的解为x = 6/5,【即等于1.2】
5.2 × 3 - 4x = 10.8
(5×10+2)/10 × 3 - 4x = (10×10+8)/10
52/10 × 3 - 4x = 108/10
26/5 × 3 - 4x = 54/5
78/5 - 4x = 54/5
4x = 78/5 - 54/5
4x = 24/5
x = 24/5 ÷ 4
x = 24/5 × 1/4
x = 6/5
∴x = 1.2
答:此方程的解为x = 6/5,【即等于1.2】
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