x+209+3x7=6 ⇒7x+140+27x63=6 ⇒ 34x+140=6× 63 ⇒ 34x=378 #8236; 140=238 ⇒ x=23834=7 ...

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Complex Numbers

Solve: x+209...

Question

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

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Solution

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

$\Rightarrow \frac{7 x + 140 + 27 x}{63} = 6$

$\Rightarrow 34 x + 140 = 6 \times 63$

$\Rightarrow 34 x = 378 ‬ - 140 = 238$

$\Rightarrow x = \frac{238}{34} = 7$

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