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jolli1 [7]
3 years ago
11

3x-7y=6 2x+7y=4 Solve by elimination

Mathematics
2 answers:
artcher [175]3 years ago
7 0
3x-7y=6 \\
\underline{2x+7y=4} \\
3x+2x=6+4 \\
5x=10 \ \ \ |\div 5 \\
x=2 \\ \\
3x-7y=6 \\
3 \times 2-7y=6 \\
6-7y=6 \ \ \ |-6
\\ -7y=0 \ \ \ |\div (-7) \\
y=0 \\ \\
(x,y)=(2,0)
jeka57 [31]3 years ago
7 0
3x-7y=6\\
\underline{2x+7y=4}\\
5x=10\\
x=2\\\\
3\cdot2-7y=6\\
6-7y=6\\
-7y=0\\
y=0

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Angelina_Jolie [31]

Answer:

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Step-by-step explanation:

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6 0
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Read 2 more answers
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ryzh [129]

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4 and 14

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:the sum of two numbers is 18" can be written as

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"twice the first number increased by three times the second number equals 40" can be written as

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Since y = 4, plug that into either equation 1 or 2 and solve for x

1.  x + 4 = 18     (y becomes 4)

     x = 14        (subtract 4 on both sides to isolate 'x')

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No look at the problem set as a fraction Jed did 2 shots in 5 seconds while simplified Alex shot 1 every 3 seconds . hope this helps 
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