rozwiąż równanie : x - ( 7 + 2x ) = 2 (x - 1 ) +1
x - ( 7 + 2x ) = 2 (x - 1 ) +1
x - 7 - 2x = 2x - 2 + 1
x - 2x - 2x = -2 + 1 + 7
-3x = 6 /:(-3)
x = -2
-x-7=2x-1
-x-2x=7-1
-3x=6;-3
x=2
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x - ( 7 + 2x ) = 2 (x - 1 ) +1
x - 7 - 2x = 2x - 2 + 1
x - 2x - 2x = -2 + 1 + 7
-3x = 6 /:(-3)
x = -2
-x-7=2x-1
-x-2x=7-1
-3x=6;-3
x=2