Math, asked by nehachauhan1905, 12 hours ago

2 एक्स माइनस वाई बराबर 5 4 एक्स प्लस 2y = 14
2x  - y = 5   \\ 4x + 6y = 14

Answers

Answered by BrainlyTwinklingstar
2

Answer

\sf \dashrightarrow 2x - y = 5 \: \: --- (i)

\sf \dashrightarrow 4x + 6y = 14 \: \: --- (ii)

पहले समीकरण से,

\sf \dashrightarrow 2x - y = 5

\sf \dashrightarrow 2x = 5 + y

\sf \dashrightarrow x = \dfrac{5 + y}{2}

अब, हम दूसरे समीकरण द्वारा y का मान ज्ञात कर सकते हैं।

\sf \dashrightarrow 4x + 6y = 14

\sf \dashrightarrow 4 \bigg( \dfrac{5 + y}{2} \bigg) + 6y = 14

\sf \dashrightarrow \dfrac{20 + 4y}{2} + 6y = 14

\sf \dashrightarrow \dfrac{20 + 4y + 12y}{2} = 14

\sf \dashrightarrow \dfrac{20 + 16y}{2} = 14

\sf \dashrightarrow 20 + 16y = 14 \times 2

\sf \dashrightarrow 20 + 16y = 28

\sf \dashrightarrow 16y = 28 - 20

\sf \dashrightarrow 16y = 8

\sf \dashrightarrow y = \dfrac{8}{16}

\sf \dashrightarrow y = \dfrac{1}{2}

अब, हम पहले समीकरण द्वारा x का मान ज्ञात कर सकते हैं।

\sf \dashrightarrow 2x - y = 5

\sf \dashrightarrow 2x - \dfrac{1}{2} = 5

\sf \dashrightarrow \dfrac{4x - 1}{2} = 5

\sf \dashrightarrow 4x - 2 = 5 \times 2

\sf \dashrightarrow 4x - 2 = 10

\sf \dashrightarrow 4x = 10 + 2

\sf \dashrightarrow 4x = 12

\sf \dashrightarrow x = \dfrac{12}{4}

\sf \dashrightarrow x = 3

अत: x और y के मान 3 और ½ हैं।

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