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11111nata11111 [884]

3 years ago

8

How to solve this system of equation 3x + y= 17 and 4x + 2 y = 20

1 answer:

lana66690 [7]3 years ago

4 0

<span>3x + y= 17 (a)
4x + 2 y = 20 (b)

Multiply (a) by 2:

6x + 2y = 34 (a)
4x + 2y = 20 (b)

make: (a) - (b)

2x = 14 -----> x =7

-------------------------------

Replace the value of x = 7 in one of anterior equation:

</span>3x + y= 17
3 x 7 + y = 17
21 + y = 17
y = 17 - 21
y = -4

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3 years ago

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TEA [102]

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<h2> </h2><h2 />

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3 years ago

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Nikolay [14]

Hi!

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Hope this helps! :)
-Peredhel

6 0

3 years ago

Read 2 more answers