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Odpowiedź :

LoczeeQ

a)

[tex] - 5 - 6x = 10x + 27 \\ - 16x = 32 | \div ( - 16) \\ x = - 2[/tex]

b)

[tex]2(a + 1) = 4 - 3a \\ 2a + 2 = 4 - 3a \\ 5a = 2 | \div 5 \\ a = \frac{2}{5} [/tex]

c)

[tex]x + 7 \frac{1}{2} = 3.2 \\ x + \frac{15}{2} = 3.2 | \times 2 \\ 2x + 15 = 6.4 \\ 2x = - 8.6 | \div 2 \\ x = - 4.3[/tex]

d)

[tex]2(x + 3) = 10 \\ 2x + 6 = 10 \\ 2x = 4 | \div 2 \\ x = 2[/tex]

e)

[tex]12.5 - x = 48.25 \\ - x = 35.75 | \times ( - 1) \\ x = - 35.75[/tex]

Magda

Odpowiedź:

[tex]a)\\\\-5-6x=10x+27\\\\-6x-10x=27+5\\\\-16x=32\ \ /:(-16)\\\\x=-2\\\\\\b)\\\\2(a+1)=4-3a\\\\2a+2=4-3a\\\\2a+3a=4-2\\\\5a=2\ \ /:5\\\\x=\frac{2}{5}\\\\\\c)\\\\x+7\frac{1}{2}=3,2\\\\x+7,5=3,2\\\\x=3,2-7,5\\\\x=-4,3[/tex]

[tex]d)\\\\2(x+3)=10\\\\2x+6=10\\\\2x=10-6\\\\2x=4\ \ /:2\\\\x=2\\\\\\e)\\\\12,5-x=48,25\\\\-x=48,25-12,5\\\\-x=35,75\ \ /\cdot(-1)\\\\x=-35,75[/tex]

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