penyelesaian sistem persamaan 2y – x = 10 dan 3y + 2x = 29 adalah x = a dan y = b. nilai 4a + 3b =
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Jawaban:
[tex]2y - x = 10 \: | \times 2| \\ 3y + 2x = 29 \: | \times 1| \\ \\ (4y - 2x = 20) + (3y + 2x = 29) \\ 7y = 49 \\ y = 7 \\ \\ 2y - x = 10 \\ 2.7 - x = 10 \\ 14 - x = 10 \\ x = 4 [/tex]
[tex]4a + 3b = 4x + 3y \\ = (4.4) + (3 .7) \\ = 16 + 21 = 37[/tex]
JAWABAN :37
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