Question

解方程：3/4x+0.5×0.75=1 1.5×1/2+0.5x=15/4

求大神解答！！

Answer 1

3/4x+0.5×0.75=1
两边同乘以8，得
6x+3=8
6x=5
x=5/6

1.5×1/2+0.5x=15/4
两边同乘以4，得
3+2x=15
2x=12
x=6

追问

您的我有点看不大懂，，不过还是谢谢

追答

去分母来解的。

追问

噢 谢谢

Answer 2

3/4x+0.5×0.75=1
3/4x+3/8=1
3/4x=1-3/8
3/4x=5/8
x=5/8÷3/4
x=5/6

1.5×1/2+0.5x=15/4
3/4+0.5x=15/4
0.5x=15/4-3/4
0.5x=3
x=3÷0.5
x=6

追问

谢谢！

Answer 3

4×0.5×3 = 6.7
4×1.5 = 6.7

4倍= 5.2

X = 1.3

5倍 - 3.3 = 7.3

5倍= 10.6

X = 2.12

1.7-0.7X = 20

0.7倍= -18.3

x≈-26.14

的x 4.5 + 5.5 = 15

X +1 = 15
X = 14

追问

谢谢