Question

Urgenteeeeee alguem ajuda porfavor

Answer 1

$a) \: 2x - x = 2 \\ x = 2 \\ b) \: 2 x - x = 20 \\ x = 20 \\ c) \: 2x + 5x = 7 \\ 7x = 7 \\ x = \frac{7}{7} \\ x = 1 \\ d) \: 3x + 15 = 5 \times 2x \\ 3x + 15 = 10x \\ 3x + 15 - 10x = 0 \\ - 7x + 15 = 0 \\ - 7x + = - 15 \\ x= \frac{ - 15}{ - 7} \\ x = \frac{15}{7} \\ e) \: 3x + 2x = 6 \\ 5x = 6 \\ x = \frac{6}{5} \\ f) \: 2x - \frac{1}{2} - 5x = \frac{1}{3} \\ - 3x - \frac{1}{2} = \frac{1}{3} \\ - 3x = \frac{2}{6} + \frac{3}{6} \\ - 3x = \frac{2 + 3}{6} \\ - 3x = \frac{5}{6} \\ x = \frac{5}{6} \\ \: \: \: \: \: \: \: \: \frac{}{ - 3} \\ x = \frac{5}{6( - 3)} \\ x = \frac{5}{ - 18} \\ x = - \frac{5}{18} \\ g) \: 4x - 4 = 20 - x \\ 4x - 4 + x = 20 \\ 5x - 4 = 20 \\ 5x = 20 + 4 \\ 5x = 24 \\ x = \frac{24}{5} \\ h) \: 2x + 4x = 216 - 3x \\ 6x = 21 - 3x \\ 6x + 3x = 216 \\ 9x = 216 \\ x = \frac{216}{9} \\ x24 \\ i) \: 6x + 4x + 3x = 624 \\ 10x + 3x = 624 \\ 13x = 624 \\ x = \frac{624}{13} \\ x = 48 \\ j) \: 5x + 8x = 680 - 4x \\ 13x = 680 - 4x \\ 17x = 680 \\ x = \frac{680}{17} \\ x = 40$