Question

resolva as eguações
x/4+1/3-9
x/2-3/5+x=3x/4+9​

Answer 1

$\frac{x}{2} - \frac{3}{5} + x = \frac{3x}{4} + 9 \\ mmc = 20 \\ 20 \div 2 - 20 \div 5 + 1 \div 20 = 20 \div 4 + 20 \div 1 \\ 10 \times x - 4 \times 3 + 20 \times x = 3x \times 5 + 20 \times 9 \\ \frac{10x}{20} - \frac{12}{20} + \frac{20x}{20} = \frac{15x}{20} + \frac{180}{20 } \\ 10x - 12 + 20x = 15x + 180 \\ 10x + 20x - 15x = 180 + 12 \\ 30x - 15 x = 192 \\ 15x = 192 \\ x = \frac{192}{15} \\ x = 12.8$