(45-x)×(1-1/5)=x
2个回答
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解:解方程,此方程的解为x = 20
(45-x) × (1-1/5) = x
(45 - x)× (5/5 - 1/5)= x
(45 - x) × 4/5 = x
45 × 4/5 - (4/5)x = x
36 - (4/5)x = x
x + (4/5)x = 36
(5/5)x + (4/5)x = 36
(9/5)x = 36
x = 36 ÷ 9/5
X = 36 × 5/9
x = 4 × 5
∴x = 20
答:此方程的解为x = 20
(45-x) × (1-1/5) = x
(45 - x)× (5/5 - 1/5)= x
(45 - x) × 4/5 = x
45 × 4/5 - (4/5)x = x
36 - (4/5)x = x
x + (4/5)x = 36
(5/5)x + (4/5)x = 36
(9/5)x = 36
x = 36 ÷ 9/5
X = 36 × 5/9
x = 4 × 5
∴x = 20
答:此方程的解为x = 20
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