Question

preciso para hoje !!!
PFVRRRR!!!!!
preciso das contas tbm !​

Answer 1

Resposta:

a) x = 240

b) 15

c) x = -6

d) x =40

e)

f) 16/3

Explicação passo a passo:

a) $\frac{x}{4} + 20 = \frac{x}{3} \\\\\\frac{3x}{12} + 240 = \frac{4x}{12} \\240 = 4x - 3x\\x = 240$

b)$\frac{2}{5}y - \frac{3}{4} = \frac{3}{20}y\\\frac{4}{20}y - \frac{15}{20} = \frac{3}{20}y\\4y - 15 = 3y\\4y - 3y = 15\\y = 15$

c)$1 - \frac{x}{2} = -\frac{1}{3}x + 2\\6 - \frac{3x}{6} = -\frac{2}{6}x + 12\\6 - 3x = - 2x + 12\\6 - 12 = - 2x + 3x\\ x = - 6$

d)$\frac{x -10}{9} + \frac{x}{6} = 10\\\frac{2x - 20}{18} + \frac{3x}{18} = 180\\2x - 20 + 3x = 180\\2x + 3x = 200\\5x = 200\\x= 40$

e)$\frac{x+3}{4} - \frac{x - 1}{3} = \frac{7}{2} \\\frac{3x+9}{12} - \frac{4x + 4}{12} = \frac{42}{12} \\3x + 9 - 4x - 4 = 42\\3x - 4x = 42 - 9 - 4\\-x = 33\\-x = 33 (-1)\\x= -33$

f)$\frac{4x - 1}{10} - 2 = \frac{4}{5} - \frac{2 - x}{4} \\\frac{8x - 2}{20} - 40 = \frac{16}{20} - \frac{10 - 5x}{20} \\8x - 2 - 40 = 16 - 10 - 5x\\8x + 5x = 40 - 14- 10 \\3x = 16\\x = \frac{16}{3}$

Deu muito trabalho, se puder colocar como melhor resposta agradeceria demais! :)