Given that y - cx - d-b- where b - 0 - a - c - 0- then- what is the value of x - if ax - by - c - 0-

The correct option is A ( d c)/(a + c)Given, ax + by + c = 0, Also given, y=(cx+d)/b, substitute this in ax + by + c = 0 We get, ax + [b (cx + d)/b] + c ...

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Standard IX

Mathematics

Substitution Method

Given that y ...

Question

$Given that y = \frac{(c x + d)}{b}$ ;

$where b \neq 0 & (a + c) \neq 0$ ,

$then, what is the value of x, if a x + b y + c = 0 ?$

\frac{(d + c)}{(a + c)}

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\frac{(- d - c)}{(a + c)}

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\frac{(a + c)}{(d + c)}

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Solution

The correct option is B $\frac{(- d - c)}{(a + c)}$
$Given, a x + b y + c = 0,$
$Also given, y = \frac{(c x + d)}{b}, substitute this in a x + b y + c = 0$
$We get, a x + [b \frac{(c x + d)}{b}] + c = 0$
$\Rightarrow a x + c x + d + c = 0$
$(a + c) x = - d - c$
$∴ x = \frac{(- d - c)}{(a + c)}$

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Given that y=(cx+d)b; where b≠0 & (a+c)≠0, then, what is the value of x,if ax+by+c=0?

The correct option is B (−d−c)(a+c)Given, ax+by+c=0, Also given, y=(cx+d)b,substitute this in ax+by+c=0 We get, ax+[b(cx+d)b]+c=0 ⇒ax+cx+d+c=0 (a+c)x=−d−c ∴x=(−d−c)(a+c)

$Given that y = \frac{(c x + d)}{b}$ ;

$where b \neq 0 & (a + c) \neq 0$ ,

$then, what is the value of x, if a x + b y + c = 0 ?$

The correct option is B $\frac{(- d - c)}{(a + c)}$
$Given, a x + b y + c = 0,$
$Also given, y = \frac{(c x + d)}{b}, substitute this in a x + b y + c = 0$
$We get, a x + [b \frac{(c x + d)}{b}] + c = 0$
$\Rightarrow a x + c x + d + c = 0$
$(a + c) x = - d - c$
$∴ x = \frac{(- d - c)}{(a + c)}$