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steposvetlana [31]
3 years ago
10

4x+5y=6 and 6x-7y=-20​

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
5 0

Answer:

Step-by-step explanation:

4x+5y=6

x=\frac{6-5y}{4}

6(\frac{6-5y}{4})-7y=-20

9-7.5y-7y=-20

-14.5y=-20

y=\frac{20}{29}

5(\frac{20}{29})+4x=6

x=\frac{37}{58}

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The first side of a triangle is 2 inches shorter than the second side. The third side is 5 inches longer than the second side. I
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Let the length of second side be x" ,

So,
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=×=×=×=×=×=×=×=×=×=×=×=×=×=×=×=×=




\text{Perimeter = sum of all sides  }



Given, perimeter = 33"




= > first side + second side + third side = 33"


= > ( x - 2 ) + x + ( x + 5 ) = 33

= > x - 2 + x + x + 5 = 33

= > 3x + 3 = 33

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= \:   >  x = \frac{30}{3}


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Hence, length of each side is

First side = ( x - 2 )" = ( 10 - 2 )" = 8 inches

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Third side = ( x + 5 )" = ( 10 + 5 )" = 15 inches
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