Question

Ayuda es para hoy!!!! (PROPORCIONES)

Answer 1

1)

$\frac{x}{5} = \frac{9}{15}$

$x*15 = 5*9$

$15x = 45$

$x = \frac{45}{15}$

$x = 3$

2)

$\frac{2}{7} = \frac{12}{x}$

$2*x = 7*12$

$2x = 84$

$x = \frac{84}{2}$

$x = 42$

3)

$\frac{4}{6} = \frac{16}{x}$

$4*x = 6*16$

$4x = 96$

$x = \frac{96}{4}$

$x = 24$

4)

$\frac{3}{2} = \frac{6}{x}$

$3*x = 2*6$

$3x = 12$

$x = \frac{12}{3}$

$x = 4$

5)

$\frac{x - 5}{4} = \frac{3}{2}$

$(x - 5)*2 = 4*3$

$2x - 10 = 12$

$2x = 12 + 10$

$2x = 22$

$x = \frac{22}{2}$

$x = 11$

6)

$\frac{2x - 7}{x + 1} = \frac{5}{4}$

$(2x - 7)*4 = (x + 1)*5$

$8x - 28 = 5x + 5$

$8x = 5x + 5 + 28$

$8x = 5x + 33$

$8x - 5x = 33$

$3x = 33$

$x = \frac{33}{3}$

$x = 11$

7)

$\frac{x}{x + 6} = \frac{2}{3}$

$x*3 = (x + 6)*2$

$3x = 2x + 12$

$3x - 2x = 12$

$x = 12$

8)

$\frac{x - 3}{2} = \frac{3}{6}$

$(x - 3)*6 = 2*3$

$6x - 18 = 6$

$6x = 6 + 18$

$6x = 24$

$x = \frac{24}{6}$

$x = 4$

9)

$\frac{5x + 2}{3x + 25} = \frac{1}{2}$

$(5x + 2)*2 = (3x + 25)*1$

$10x + 4 = 3x + 25$

$10x = 3x + 25 - 4$

$10x = 3x + 21$

$10x - 3x = 21$

$7x = 21$

$x = \frac{21}{7}$

$x = 3$

10)

$\frac{x - 7}{x + 4} = \frac{2}{3}$

$(x - 7)*3 = (x + 4)*2$

$3x - 21 = 2x + 8$

$3x = 2x + 8 + 21$

$3x = 2x + 29$

$3x - 2x = 29$

$x = 29$

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Espero haberte ayudado;)