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Tanzania [10]
3 years ago
7

PLSSSSSSSSSSSSSS HELPPP FOR REAL SOMEBODDYY REWARD BRAINLIEST!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Vsevolod [243]3 years ago
8 0

Answer:

1. x = 3

2. (1, 0)

3. x = 3, -2

4. 144

5. -3 <u>+</u> 4√3

Step-by-step explanation:

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SOLVE EACH SYSTEM USING SUBSTITUTION
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1. since the equations equal each other 
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-x        -x
x+19=7
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x= -12
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2. x+2y=-7
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i don't know what the second equation is equal to, i'll assume 0

2y=x-7
y=1/2x-7/2
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sub into y=1/2x-7/2
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3. </span>x+5y=2
<span>x=-4y+5
</span>sub x=-4y+5 into x+5y=2
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4. 3x+y=9
<span>y=-5x+9
</span>sub -5x+9 into 3x+y=9
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-2x=0
x=0
sub into y=-5x+9
y=-5(0)+9
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Answer:

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Step-by-step explanation:

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