English, asked by naba34, 1 year ago


3x - 7 \div 5 - 3x + 7 \div 4 = 5x - 9 \div 8 - 3x + 9 \div 6

Answers

Answered by abhi178
2

I think your question is ->

(3x - 7)/(5 - 3x) + 7/4 = (5x - 9)/(8 - 3x) + 9/6

⇒{4(3x - 7) + 7(5 - 3x)}/4(5 - 3x) = (5x - 9)/(8 - 3x) + 3/2

⇒{12x - 28 + 35 - 21x}/4(5 - 3x) = {2(5x - 9) + 3(8 - 3x)}/2(8 - 3x)

⇒{- 9x + 7}/4(5 - 3x) = {10x - 18 + 24 - 9x}/2(8 - 3x)

⇒(-9x + 7)/2(5 - 3x) = (x + 6)/(8 - 3x)

⇒(-9x + 7)(8 - 3x) = 2(x + 6)(5 - 3x)

⇒-72x + 27x² + 56 - 21x = 2{5x - 3x² + 30 - 18x}

⇒27x² - 93x + 56 = -6x² - 26x + 60

⇒33x² - 67x - 4 = 0

⇒ x = {67 ± √(67² + 4 × 4 × 33)}/66

= {67 ± √(5017)}/66

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