30-5X=30(解方程)
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10x/3=1/310x=1x=1/105x+3(30-x)=1005x+90-3x=1002x=100-902x=10x=5希望对你有所帮助
5X+30=7X+247x-5x=30-242x=6x=3
第一个方程X=0.5第二个X=301200/(2+3)=240天
X/(x-30)=(x+40)/XX^2=(X-30)*(X+40)X^2=X^2+40X-30X-120010X=1200X=120
X-0.3X=520.7X=52X=52÷0.7X=520/7
5x+30=4x-205x-4x=-30-20x=-50结果为-50
30%x=5分之1x3/10x=1/5x3/10x-1/5x=01/10x=0x=0
移项得x=40再问:过程是什m再答:
5x+30=6x-105x+30+10=6x-10+105x+40-5x=6x-5x40=xx=40或者:5x+30=6x-106x-5x=30+10x=40
5X+1.82+2x=30*0.245x+2x=7.2-1.827x=5.38x=5.38/7x=269/350
30(x-5)+25x=18030x-150+25x=18055x=180+15055x=330x=6
x(1-0.3)=0.280.7x=0.28x=0.4
(X+30%X)70%=X-181.3x×0.7=x-180.91x=x-18(1-0.91)x=180.09x=18x=18÷0.09x=200
x+30%x=521.3x=52x=52÷1.3x=40
7x-5x=30-82x=22x=11
5x-24+x-(240-8x-2x+30)=106x-24-(270-10x)=1016x-294=1016x=304x=19再问:为什么是+30而不是-30啊?乘号在前面不变号吧?再答:-2×(x
两边乘12(30-x)10x=5/4*12(30-x)10x=15(30-x)10x=450x-15x25x=450x=450÷25x=18
你懒惰了,通分得:50x=300x=6
8x-5x=30+63x=36x=36÷3x=12
(6x+180)/(5x+30)=1.52(6x+180)=3(5x+30)12x+360=15x+9015x-12x=360-903x=270x=90