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lawyer [7]
3 years ago
9

Help me pls.............

Mathematics
1 answer:
labwork [276]3 years ago
6 0
10x - 7y = -1....multiply by -1 to make that -7y positive
-2x - 7y = -25
------------------
-10x + 7y = 1 (result of multiplying by -1)
-2x - 7y = -25
-----------------add
-12x = - 24
x = 2

-2x - 7y = -25
-2(2) - 7y = -25
-4 - 7y = -25
-7y = - 25 + 4
-7y = - 21
y = 3

solution is : (2,3)
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Tickets to a school play cost $2 if bought in advance, and $3 if bought at the door. By selling all 400 of their tickets, $1030
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230 were sold at the door

170 were sold in advance

Step-by-step explanation:

*i dont know if this is the proper way to do it but it has the correct answer

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3x+2y=1030

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2y=-3x+1030

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Step-by-step explanation:

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-1 = s

Step-by-step explanation:

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Decimal representation of a rational number cannot be
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1/2 (5-7x) = 8- 4x+6
Andre45 [30]
1/2(5-7x)=8-4x+6
-7/2x+5/2=-4x+14                       Simplify both sides
1/2x+5/2=14                               Add 4x to both sides
1/2x=23/3                                   Subtract 5/2 on both sides
2*(1/2x)=2*(23/2)                       Multiply both sides by 2
x=23 - Final Answer

                                             Cheers, Irys
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