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Mashcka [7]
2 years ago
8

Explain how to solve this

Mathematics
1 answer:
soldier1979 [14.2K]2 years ago
4 0
A^2+B^2=c^2 that’s how you do it
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How to work this problem
Mazyrski [523]
7x + 9y = - 27_________eq1
3x - y = 3__________eq2
Multiply eq 2 by 9 and then add the resulting eq with eq1.

eq2 x 9 gives us   27x - 9y = 27___________eq3
 
add eq3 with eq1 we get.
34x = 0.
where x=0/34
x=0.
substitute x into any of the above equations to get y.
substitute x into eq1. we get:
7(0) + 9y =-27
9y = -27
y= -27/9
y = -3.
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3 years ago
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aleksandr82 [10.1K]
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3 years ago
Divide use estimation to check your answer
Vesnalui [34]

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Step-by-step explanation:

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