Question

Considere a proporção x/y=7/4, sabendo que x+Y=242, Calcule o valor de x-y.

Answer 1

$\frac{x}{y} = \frac{7}{4}$

$\frac{x+y}{x} = \frac{7+4}{7}$

$\frac{242}{x}= \frac{11}{7}$

$11x=1694$

$x= \frac{1694}{11} =154$

$\frac{242}{y} = \frac{11}{4}$

$11y=968$

$y= \frac{968}{11} =88$

se x=154
y=88
x-y=154-88=66

Answer 2

x/y= 7/4
x+y= 242

4x=7y