90%((1+50%)X+(1+40%)(500—X))-500=157怎么解
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90%((1+50%)X+(1+40%)(500—X))-500=157怎么解
90%((1+50%)X+(1+40%)(500—X))-500=157怎么解
90%((1+50%)X+(1+40%)(500—X))-500=157怎么解
90%((1+50%)X+(1+40%)(500—X))-500=157
1.35X+1.4*500-1.4X-500=157
-0.05X+200=157
0.05X=200-157
0.05X=43
X=860
求几道解方程数学题60%x+25=40 x+30%x=52 19-120%x=7 x-10%x=18 (1-25%)x=362x+30%x=9.260%x+90=102 x-20%=5.2 50%x+3x=28 9.1-14%x=0.7
x{x+1}{x-1}}x-2}{x-3}-40
x/40+x/50=1+1/200*x
X/50+(40-X)/30=1
x/50+5-1=x/40
x加30%x=52、x减40%x=15、50%x加x=31.5、x减1%x=19.8、x加25%x=2.5、x减15%x=8.5
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)...(x-49)等于多少?
x+60%x=80 80%-30x=305 35%x=210 x+50%x=60 x-40%x=0x+60%x=8080%-30x=30535%x=210x+50%x=60x-40%x=0.36(1-80%)x=21么么哒!
X(X-1)=90
x{x+1}{x-2}{x-3}-40
分解因式:x(x-1)(x+2)(x+3)-40
50x(x-1)+60x(x-4)=5100
(x+1)+(x+2)+(X+3).+(x+50)=1325
x除55%=100 60%x=30 x+50%x=4.5 (1-25%)x=72 4x+40%x=176 解方程
x/x+(1-x)/x-1/x
解方程 40%x=12 (1+60%)x=24 (1-37.5%)x=10 2x+50%x=20 40%x+30%x=140 35%x-15%x=72
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
解方程 x-1%x=19.8x-40%x=15x+25%x=2.550%x+x=31.5x-15%x=8.5