Question

2x÷1.8=3.2怎么解？

2x÷1.8=3.2解方程。

Answer 1

解：解方程, 此方程的解为x = 72/25,【即x = 2.88】
2x ÷ 1.8 = 3.2
2x = 3.2 × 1.8
2x = （3×10+2）/10 × （1×10+8）/10
2x = 32/10 × 18/10
2x = 16/5 × 9/5
2x = 144/25
x = 144/25 ÷ 2
x = 144/25 × 1/2
x = 72/25
∴x = 2.88
答：此方程的解为x = 72/25,【即x = 2.88】

Answer 2

2x÷1.8=3.2
2x=3.2×1.8
x=3.2×1.8÷2
=2.88
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Answer 3

2x÷1.8=3.2
2x=3.2×1.8
2x=5.76
x=2.88

Answer 4

两边乘1.8
2x=5.76
两边除以2
x=2.88

Answer 5

2x ÷1.8=3.2
2x=3.2*1.8
2x=5.76
x=5.76 ÷2
x=2.88