3(0,4y+3)-0,6=8Допоможіть будьласка 0,6(0,5x+2/3(дріб))=2,25+5,3x1/6y(0,5+8/9y=1/9y-(1/3-y)x/3-x/4=2/3y/4=2y/5-2 1/10. Created by semkoaleksandra. matematika-ru

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3(0,4y+3)-0,6=8

Допоможіть будьласка

0,6(0,5x+2/3(дріб))=2,25+5,3x

1/6y(0,5+8/9y=1/9y-(1/3-y)

x/3-x/4=2/3

y/4=2y/5-2 1/10

Answers & Comments

vseznaika0595

$1.2y + 9 - 0.6 = 8 \\ 1.2y = 8 - 9 + 0.6 \\ 1.2y = - 0.4 \\ y = - 0.4 \div 1.2 \\ y = - \frac{4}{10} \times \frac{10}{12} \\ y = - \frac{1}{3} \\ 2)0.6 \times (0.5x + \frac{2}{3}) = 2.25 + 5.3x \\ 0.3x + \frac{6}{10} \times \frac{2}{3} = 2.25 + 5.3x \\ 0.3x + 0.4 = 2.25 + 5.3x \\ 0.3x - 5.3x = 2.25 - 0.4 \\ - 5x = 1.85 \\ x = 1.85 \div ( - 5) \\ x = - 0.37$

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