（x-9.4)*4.5=30.6 9*3-1.7x=13.4 (x+3.7)*2.8=14.56 (x-9.4)*4.5=30.6 6.8x=8.33*9+4.7x 解方程
问题描述：
（x-9.4)*4.5=30.6 9*3-1.7x=13.4 (x+3.7)*2.8=14.56 (x-9.4)*4.5=30.6 6.8x=8.33*9+4.7x 解方程
答
（x-9.4)*4.5=30.6
x-9.4=6.8
x=6.8+9.4
x=16.2
9*3-1.7x=13.4
1.7x=27-13.4
1.7x=13.6
x=8
(x+3.7)*2.8=14.56
x+3.7=5.2
x=1.5
(x-9.4)*4.5=30.6
x-9.4=6.8
x=6.8+9.4
x=16.2
6.8x=8.33*9+4.7x
2.1x=8.33*9
x=35.7
答
（x-9.4)*4.5=30.6
x-9.4=6.8
x=16.2
9*3-1.7x=13.4
-1.7x=4.1
x=41/17
(x+3.7)*2.8=14.56
x+3.7=5.2
x=1.5
(x-9.4)*4.5=30.6
x-.9.4=6.8
x=16.2
6.8x=8.33*9+4.7x
6.8x-4.7x=8.33*9
2.1x=8.33*9
x=2499/70