Question

解方程 2.7x+3=97.5 0.95÷0.4x=1.9 6.8+x=24.5 6x-4x7.5=24 4.8x-8=25.6 12x-6x5=210 9x-4x=74.6

180（x÷4）=74

Answer 1

2.7x+3=97.5
解：2.7x=97.5-3
x=94.5÷2.7
x=35
0.95÷0.4x=1.9
解：0.4x=0.95÷1.9
x=0.5÷0.4
x=1.25
6.8+x=24.5
解： x=24.5-6.8
x=17.7
6x-4x7.5=24
解： 6x=24+30
x=54÷6
x=9
4.8x-8=25.6
解：4.8x=25.6+8
x=33.6÷4.8
x= 7
12x-6x5=210
解： 12x=210+30
x=240÷12
x=20
9x-4x=74.6
解：5x=74.6
x=74.6÷5
x=14.92
180（x÷4）=74
解：x÷4=74÷180
x=37/90×4
x=74/45

Answer 2

2.7x+3=97.5
2.7x=97.5-3
2.7x=94.5
x=35

0.95÷0.4x=1.9
1.9*0.4x=0.95
0.4x=0.5
x=1.25

6.8+x=24.5
x=24.5-6.8
x=17.7

6x-4x7.5=24
6x=24-30
6x=-6
x=-1

4.8x-8=25.6
4.8x=25.6+8
4.8x=33.6
x=7

12x-6x5=210
12x=210+30
12x=240
x=20

180(x÷4)=74
180x÷4=74
45x=74
x=74/45

9x-4x=74.6
5x=74.6
x=14.92

Answer 3

2.7x+3=97.5
2.7x=94.5
x=35

0.95÷0.4x=1.9
0.4x=0.5
x=1.25

6.8+x=24.5
x=24.5-6.8
x=17.7

6x-4x7.5=24
6x-30=24
6x=54
x=9

4.8x-8=25.6
4.8x=33.6
x=7

12x-6x5=210
12x-30=210
12x=240
x=20

9x-4x=74.6
5x=74.6
x=14.92

180-（x÷4）=74
x÷4=106
x=424