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Pioter12883go
Rozwiązane

Rozwiąż i sprawdź równania:
a) 7.x + 2 = 30
b) 8.x - 5 - 4.x = 15
c) 9.x = 5.X-8
d) 8 + 3.x = 7.x-4
e) 1 - 4.x-5-5.X + 2 = 6.X - 6 - 8:X-3
f) 4.(x-2) + x = 7
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Rozwiąż I Sprawdź Równaniaa 7x 2 30b 8x 5 4x 15c 9x 5X8d 8 3x 7x4e 1 4x55X 2 6X 6 8X3f 4x2 X 7 class=

Odpowiedź :

Basetlago

a)

[tex]7x + 2 = 30\\\\7x = 30-2\\\\7x = 28 \ \ /:7\\\\x = 4[/tex]

b)

[tex]8x-5-4x = 15\\\\4x = 15+5\\\\4x = 20 \ \ /:4\\\\x = 5[/tex]

c)

[tex]9x=5x-8\\\\9x-5x = -8\\\\4x = -8 \ \ /:4\\\\x = -2[/tex]

d)

[tex]8 + 3x = 7x - 4\\\\3x-7x =-4-8\\\\-4x = -12 \ \ /:(-4)\\\\x = 3[/tex]

e)

[tex]1 - 4x-5-5x+2 = 6x-6-8x-3\\\\-9x-2 = -2x-9\\\\-9x+2x = -9+2\\\\-7x = -7 \ \ /:(-7)\\\\x = 1[/tex]

f)

[tex]4(x-2)+x = 7\\\\4x-8+x = 7\\\\5x = 7+8\\\\5x = 15 \ \ /:5\\\\x = 3[/tex]

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