Question

Find x.
$0.3(6 - x) = 0.4(x + 8)$
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Answer 1

$\huge\bf\underline{Solution:}$

$0.3(6 - x) = 0.4(x + 8) \\ \frac{3}{10} \times 6 - \frac{3}{10} x = \frac{4}{10} x + \frac{4}{10} \times 8 \\ \frac{18}{10} - \frac{32}{10} = \frac{4}{10} x + \frac{3}{10} x \\ \frac{14}{10} = \frac{7}{10} x \\ \frac{14}{10} \times \frac{10}{7} = x \\ x = 2$

Answer 2

Sol)
0.3(6-x) = 0.4(x+8)
0.3×6 - 0.3x=0.4x + 0.4×8
1.8 - 0.3x = 0.4x + 3.2
1.8-3.2=0.4x + 0.3x
-1. 4 = 0.7x
0.7x = -1. 4
x = - 1.4/0.7
x= 2 ans