1.8÷0.9+3x=8.6方程怎么解?
2个回答
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解:解方程, 此方程的解为x = 11/5,【即x = 2.2】
1.8 ÷ 0.9 + 3x = 8.6
(1×10+8)/10 ÷ 9/10 + 3x = (8×10+6)/10
18/10 × 10/9 + 3x = 86/10
2 + 3x = 43/5
3x = 43/5 - 2
3x = 43/5 - 10/5
3x = 33/5
x = 33/5 ÷ 3
x = 33/5 × 1/3
x = 11/5
∴x = 2.2
答:此方程的解为x = 11/5,【即x = 2.2】
1.8 ÷ 0.9 + 3x = 8.6
(1×10+8)/10 ÷ 9/10 + 3x = (8×10+6)/10
18/10 × 10/9 + 3x = 86/10
2 + 3x = 43/5
3x = 43/5 - 2
3x = 43/5 - 10/5
3x = 33/5
x = 33/5 ÷ 3
x = 33/5 × 1/3
x = 11/5
∴x = 2.2
答:此方程的解为x = 11/5,【即x = 2.2】
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