⇒x+20/9+3x/7=6 ⇒7(x+20)+9(3x)/63=6 ⇒ 7x+140+27x=378 ⇒ 34x=378 140 ⇒ #160;34x=238 ⇒ x=238/34 ⇒ x=7 ...

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Linear Equation in One Variable

x+209+3x7=6.

Question

$\frac{x + 20}{9} + \frac{3 x}{7} = 6.$

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Solution

$\Rightarrow \frac{x + 20}{9} + \frac{3 x}{7} = 6$
$\Rightarrow \frac{7 (x + 20) + 9 (3 x)}{63} = 6$
$\Rightarrow 7 x + 140 + 27 x = 378$
$\Rightarrow 34 x = 378 - 140$
$\Rightarrow 34 x = 238$
$\Rightarrow x = \frac{238}{34}$
$\Rightarrow x = 7$

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