Odpowiedź:
[tex]\boxed{zad.7}[/tex]
[tex]a)~~6-\huge\boxed{14}\div 7= 4[/tex]
[tex]b)~~2^{3} -\huge\boxed{(-4,4)}\cdot5=30[/tex]
Szczegółowe wyjaśnienie:
Kolejności wykonywanych działań:
Obliczamy:
[tex]\huge\boxed{zad.7}[/tex]
[tex]a)\\\\6-x\div 7 =4\\\\6-\dfrac{x}{7} =4~~\mid \cdot 7\\\\42-x=28~~\mid -42\\\\-x=28-42\\\\-x=-14~~\mid \cdot (-1)\\\\x=14\\\\6-\boxed{14}\div 7= 4[/tex]
[tex]b)\\\\2^{3} -x\cdot5=30\\\\8-5x=30~~\mid -8\\\\-5x=30-8\\\\-5x=22~~\mid \div (-5)\\\\x=-\dfrac{22}{5} \\\\x=-4\dfrac{2}{5} \\\\x=-4,4\\\\2^{3} -\boxed{(-4,4)}\cdot5=30[/tex]
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Odpowiedź:
[tex]\boxed{zad.7}[/tex]
[tex]a)~~6-\huge\boxed{14}\div 7= 4[/tex]
[tex]b)~~2^{3} -\huge\boxed{(-4,4)}\cdot5=30[/tex]
Szczegółowe wyjaśnienie:
Kolejności wykonywanych działań:
Obliczamy:
[tex]\huge\boxed{zad.7}[/tex]
[tex]a)\\\\6-x\div 7 =4\\\\6-\dfrac{x}{7} =4~~\mid \cdot 7\\\\42-x=28~~\mid -42\\\\-x=28-42\\\\-x=-14~~\mid \cdot (-1)\\\\x=14\\\\6-\boxed{14}\div 7= 4[/tex]
[tex]b)\\\\2^{3} -x\cdot5=30\\\\8-5x=30~~\mid -8\\\\-5x=30-8\\\\-5x=22~~\mid \div (-5)\\\\x=-\dfrac{22}{5} \\\\x=-4\dfrac{2}{5} \\\\x=-4,4\\\\2^{3} -\boxed{(-4,4)}\cdot5=30[/tex]