解一元一次方程:(1)1/3(x+1)+1/4(x+2)+1/5(x+3)=4-1/6(x+4)
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解一元一次方程:(1)1/3(x+1)+1/4(x+2)+1/5(x+3)=4-1/6(x+4)
解一元一次方程:(1)1/3(x+1)+1/4(x+2)+1/5(x+3)=4-1/6(x+4)
解一元一次方程:(1)1/3(x+1)+1/4(x+2)+1/5(x+3)=4-1/6(x+4)
去分母,得 20(x+1)+15(x+2)+12(x+3)=240-10(x+4)
去括号,得 20x+20+15x+30+12x+36=240-10x-40
移项,得 20x+15x+12x+10x=240-40-20-30
合并同类项,得 57x=114
系数化1得 x=2
60(x+1)+45(x+2)+36(x+3)=720-30(x+4)
171x=342
x=2
方程左右两端同乘60,得
20x+20+15x+30+12x+36=240-10x-40
57x=114
x=2