8×1.3-0.5x=9怎么解方程?
4个回答
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解:解方程, 此方程的解为x = 14/5,【即x = 2.8】
8 × 1.3 - 0.5x = 9
8 × (1×10+3)/10 - (5/10)x = 9
8 × 13/10 - (1/2)x = 9
52/5 - (1/2)x = 9
(1/2)x = 52/5 - 9
(1/2)x = 52/5 - 45/5
(1/2)x = 7/5
x = 7/5 ÷ 1/2
x = 7/5 × 2
x = 14/5
∴x = 2.8
答:此方程的解为x = 14/5,【即x = 2.8】
8 × 1.3 - 0.5x = 9
8 × (1×10+3)/10 - (5/10)x = 9
8 × 13/10 - (1/2)x = 9
52/5 - (1/2)x = 9
(1/2)x = 52/5 - 9
(1/2)x = 52/5 - 45/5
(1/2)x = 7/5
x = 7/5 ÷ 1/2
x = 7/5 × 2
x = 14/5
∴x = 2.8
答:此方程的解为x = 14/5,【即x = 2.8】
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8×1.3-0.5x=9
10.4-0.5x=9
0.5x=1.4
x=2.8
10.4-0.5x=9
0.5x=1.4
x=2.8
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8×1.3-0.5x=9怎么解方程?
8×1.3-0.5x=9
10.4-0.5x=9
0.5x=10.4-9
0.5x=1.4
x=2.8
8×1.3-0.5x=9
10.4-0.5x=9
0.5x=10.4-9
0.5x=1.4
x=2.8
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