(2) \( \frac{5(2 x-4)}{3}+6 x+\frac{7}{2}=4-5 u \) \( \frac{2 x-5}{4}-3 y+12=\frac{7}{3}-2 x \)
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To solve the first equation \( \frac{5(2 x-4)}{3}+6 x+\frac{7}{2}=4-5 u \), first, clear the fraction by multiplying through by 3, leading to \( 5(2x - 4) + 18x + \frac{21}{2} = 12 - 15u \). Simplify and combine like terms to isolate \( u \). For the second equation \( \frac{2 x-5}{4}-3 y+12=\frac{7}{3}-2 x \), multiply through by 12 to eliminate fractions, then solve for \( y \). Ensure to keep track of signs and coefficients to avoid common algebraic mistakes, like forgetting to distribute negative signs correctly!