Equation
4 / (x - 3) = 5 / (2x + 3)
Cross multiply
4 (2x + 3) = 5(x - 3)
8x + 12 = 5x - 15
8x - 5x = - 15 - 12
3x = - 27
x = - 27 / 3
x = - 9
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Answers & Comments
Equation
4 / (x - 3) = 5 / (2x + 3)
Cross multiply
4 (2x + 3) = 5(x - 3)
8x + 12 = 5x - 15
8x - 5x = - 15 - 12
3x = - 27
x = - 27 / 3
x = - 9