Rozwiązane

a) 6x + 8 = - 4
b) 8x – 11 = 7x +2
c) 4( 3 – x ) +7 = 7( 2 + x ) + 27
d) 5 – ( 4 +x ) = 10 – ( 4x – 3 )
e) 5( 2 – x ) = 10 – [ 4 +3( x – 3 )]



Odpowiedź :

Basetla

[tex]a)\\6x+8 = -4\\\\6x = -4-8\\\\6x = -12 \ \ /:6\\\\x = -2[/tex]

[tex]b)\\8x-11 = 7x + 2\\\\8x-7x = 2 + 11\\\\x = 13[/tex]

[tex]c)\\4(3-x)+7 = 7(2+x)+27\\\\12-4x+7 = 14+7x+27\\\\-4x+19 = 7x + 41\\\\-4x-7x = 41-19\\\\-11x = 22 \ \ /:(-11)\\\\x = -2[/tex]

[tex]d)\\5 - (4+x) = 10 - (4x - 3)\\\\5-4-x = 10-4x+3\\\\-x+1 = -4x+13\\\\-x+4x = 13-1\\\\3x = 12 \ \ /:3\\\\x = 4[/tex]

[tex]e)\\5(2-x) = 10-[4+3(x-3)]\\\\10-5x = 10 - (4+3x-9)\\\\10-5x = 10 - (3x-5)\\\\10-5x = 10 - 3x + 5\\\\10-5x = 15 - 3x\\\\-5x+3x = 15-10\\\\-2x = 5 \ \ /:(-2)\\\\x = -2,5[/tex]