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rezolvati in Q ecuatiea : (X -1 pe 4 ) ÷ 2,8 = -4

Răspuns :

( x - 1 / 4 ) : 2 , 8 = - 4

× - 0 , 25 = - 4 * 2 , 8

x - 0 , 25 = - 11 ,2

x = - 11 , 2 + 0 , 25

× = - 10 , 95

Multă baftă ♥ !
[tex](x - \frac{1}{4} ) \div 2.8 = - 4[/tex]

[tex]x - \frac{1}{4} = - 4 \times 2.8[/tex]

[tex]x - \frac{1}{4} = - 11.2[/tex]

[tex]x = - \frac{112}{10} + \frac{1}{4} [/tex]

[tex]x = - \frac{56}{5} + \frac{1}{4} [/tex]

[tex]x = - \frac{224}{20} + \frac{5}{20} [/tex]

[tex]x = - \frac{224 + 5}{20} [/tex]

[tex]x = - \frac{219}{20}\:\in\:\mathbb{Q} [/tex]