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2x + 3y = 10

x + 4y = 10

2x + 3y = 10

2x + 3 ( 10 + x ) = 10

2x + 30 + 3x = 10

5x + 30 = 10

5x = 30 - 10

5x = - 20

x = - 20 / 5

x = - 4

x + 4y = 10

- 4 + 4y = 10

4y = 10 - 4

4y = 6

y = 6/4

y = 1 ½

Nilai 4x - 3y

= 4(-4) - 3(6/4)

= - 16 - 4,5

= 20,5

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Jawab:

2

Penjelasan dengan langkah-langkah:

2x + 3y = 10

x + 4y = 10

2x + 3y = 10

2x + 8y = 20

------------------    -

-5y = -10

y = 2

x + 4(2) = 10

x + 8 = 10

x = 2

4x - 3y = 4(2) - 3(2) = 8 - 6 = 2

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