
x÷0.5+2x=0.8
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解:解方程,此方程的解为x = 1/5,【即x = 0.2】
x ÷ 0.5 + 2x = 0.8
x ÷ 5/10 + 2x = 8/10
x ÷ 1/2 + 2x = 4/5
x × 2 + 2x = 4/5
2x + 2x = 4/5
4x = 4/5
x = 4/5 ÷ 4
x = 4/5 × 1/4
x = 1/5
∴x = 0.2
答:此方程的解为x = 1/5,【即x = 0.2】
x ÷ 0.5 + 2x = 0.8
x ÷ 5/10 + 2x = 8/10
x ÷ 1/2 + 2x = 4/5
x × 2 + 2x = 4/5
2x + 2x = 4/5
4x = 4/5
x = 4/5 ÷ 4
x = 4/5 × 1/4
x = 1/5
∴x = 0.2
答:此方程的解为x = 1/5,【即x = 0.2】
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