CPM Homework Help : A2C Problem 11-71

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Home > A2C > Chapter 11 > Lesson 11.2.3 > Problem 11-71

11-71.

Solve each of the following equations.

$\frac { x } { x + 1 } = \frac { 5 } { 7 }$
Hint (a):
$7x = 5x + 5$
Answer (a):
$x=\frac{5}{2}$

$\frac { 2 } { y } = \frac { 3 } { y + 5 }$
Hint (b):
See part (a).

$\frac { x } { x + 1 } + \frac { 2 } { x - 1 } = \frac { 8 } { x ^ { 2 } - 1 }$
Hint (c):
Multiply by $\left(x + 1\right)\left(x − 1\right)$ .
More Help (c):
$\left(x − 1\right)x + 2\left(x + 1\right) = 8$
Answer (c):
$x = −3, x = 2$

$\frac { 2 } { y + 5 } - \frac { 3 } { y } = \frac { 3 } { y + 5 }$
Hint (d):
See part (a).

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