8.6x+33.54=120.4 x(方程)

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8.6x+33.54=120.4x(方程)8.6x+33.54=120.4x(方程)8.6x+33.54=120.4x(方程)8.6x+33.54=120.48.6x=86.86x=10.110.12

8.6x+33.54=120.4 x(方程)
8.6x+33.54=120.4 x(方程)

8.6x+33.54=120.4 x(方程)
8.6x+33.54=120.4
8.6x=86.86
x=10.1

10. 120-4(x+5)=25 11. 15x+863-65x=54 12. 12.3(x-2)+1=x691+3x=700 31.-3x+0.5x=10 32.2x-6=4x+9 33.7x-4.5x=2.5X3-

8.6x+33.54=120.4 x
移项得
33.54=120.4 x-8.6x
合并得
111.8x=33.54
两边同除以111.8得
x=0.3

8.6×+33.54=120.4
8.6×+33.54-33.54=120.4-33.54
8.6×=86.86
8.6×÷8.6=86.86÷8.6
×=10.1