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Anonymous users2024-02-05Substituting x=3, y=-2 into the :
3a-2b=2...Type 1.
c=-2, because c is wrong: but the wrong answer in ax+by=2 is substituted after x=-2, y=2.
2a+2b=2...Formula 2 is correct.
Simultaneous formula 1, formula 2 obtains: a=4, b=5
In summary: a=4, b=5, c=-2
4x-3y-6z=0
x+2y-7z=0 The solution yields x=3z y=2z substitution: (2xy+3yz+6zx) (x 2+5y 2+7z 2).
12z 2+6z 2+18z 2) (9z 2+20z 2+7z 2)=36z 2 36z 2=1 is the value evaluated
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Anonymous users2024-02-04Because A's answer is correct, you can first substitute A's x=3, y=-2 into the second equation to solve c=-2, and then because the first formula has nothing to do with c, you can substitute the first formula into the answers of A and B respectively, and solve a=4, b=5
Treat x as known and figure out the relationship between y, z and x.
y=2x/3,z=x/3.Then bring in the formula to get @=......=1 I'm writing a bit of a mess, I hope you can understand it
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Anonymous users2024-02-03Substituting x=3 y=-2 into the original equation is obtained.
3a-2b=2
3c+14=8
Substituting x=-2 y=2 into the original equation is obtained.
2a+2b=2
2c'-14=8
The solution yields a=4 b=5 c=-2 c'=-114x-3y-6z=0
x+2y-7z=0
The solution yields x=3z y=2z
2xy+3yz+6zx)/(x^2+5y^2+7z^2)=(12+6+18)z^2/(9+20+7)z^2=1
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Anonymous users2024-02-02If you write the topic clearly, you can't read it, how can I help you.
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Anonymous users2024-02-01If there are x people in field B, then there are 4x 5 people in field A.
It can be obtained from the title.
x-140）：（4x/5+140）=2:33x-420=8x/5+280
7x/5=700
x = 9804 x 5 = 786 people.
A: So there are 786 people in Game A and 980 people in Game B.
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Anonymous users2024-01-31a=5/4b b-140):(a+140)=2:3
The equation is listed, and the equation can be solved by yourself.
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Anonymous users2024-01-30The volume of elevated water is the volume of metal parts.
The volume of water is: 20*20*cubic centimeters.
The height of the cone is: 3768*3 (20*20*cm.
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Anonymous users2024-01-29The volume of water is: 20*20*cubic centimeters.
The height of the cone is: 3768*3 (20*20*cm.
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Anonymous users2024-01-2840 times 40 times 3 equals the volume of the cone, multiplied by the volume, divided by the bottom area by volume.
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Anonymous users2024-01-27Approximately, the volume of water is: 20*20*cubic centimeters.
The height of the cone is: 3768*3 (20*20*cm.
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