四点四点五除以x等于二三点五x等于一十四一点二x等于四十八一百五十减x等于三十六?
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解:解方程
四点五除以x等于二
4.5 ÷ x = 2
(4×10+5)/10 ÷ x = 2
45/10 ÷ x = 2
9/2 ÷ x = 2
x = 9/2 ÷ 2
x = 9/2 × 1/2
x = 9/4
∴x = 2.25
答:此方程的解为x = 2.25
三点五x等于一十四
3.5x = 14
[(3×10+5)/10]x = 14
(35/10)x = 14
(7/2)x = 14
x = 14 ÷ 7/2
x = 14 × 2/7
∴x = 4
答:此方程的解为x = 4
一点二x等于四十八
1.2x = 48
[(1×10+2)/10]x = 48
(12/10)x = 48
(6/5)x = 48
x = 48 ÷ 6/5
x = 48 × 5/6
∴x = 40
答:此方程的解为x = 40
一百五十减x等于三十六
150 - x = 36
x = 150 - 36
x = 150 - (40 - 4)
x = 150 - 40 + 4
x = 110 + 4
∴x = 114
答:此方程的解为x = 114
四点五除以x等于二
4.5 ÷ x = 2
(4×10+5)/10 ÷ x = 2
45/10 ÷ x = 2
9/2 ÷ x = 2
x = 9/2 ÷ 2
x = 9/2 × 1/2
x = 9/4
∴x = 2.25
答:此方程的解为x = 2.25
三点五x等于一十四
3.5x = 14
[(3×10+5)/10]x = 14
(35/10)x = 14
(7/2)x = 14
x = 14 ÷ 7/2
x = 14 × 2/7
∴x = 4
答:此方程的解为x = 4
一点二x等于四十八
1.2x = 48
[(1×10+2)/10]x = 48
(12/10)x = 48
(6/5)x = 48
x = 48 ÷ 6/5
x = 48 × 5/6
∴x = 40
答:此方程的解为x = 40
一百五十减x等于三十六
150 - x = 36
x = 150 - 36
x = 150 - (40 - 4)
x = 150 - 40 + 4
x = 110 + 4
∴x = 114
答:此方程的解为x = 114
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