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[tex] \frac{3}{4} x - 1 \frac{1}{4} = 1 \frac{3}{8} x + 12.5 \\ - \frac{5}{4} - 12 \frac{1}{2} = 1 \frac{3}{8} x - \frac{6}{8} x \\ \frac{11}{8} x - \frac{6}{8} x = - \frac{5}{4} -12 \frac{2}{4} \\ \frac{5}{8} x = - 12 \frac{7}{4} \\ \frac{5}{8} x = -13 \frac{3}{4} \\ x = - 13 \frac{3}{4} \div \frac{5}{8} \\ x = - \frac{55 \times 8}{4 \times 5} \\ x = - 22[/tex]