Rozwiąż rówania :
a ) - ( 2x - 1 ) = 4
b ) 2t - ( 3 t + 1 ) = 6
c ) - ( 4 + x ) = 2 ( 3 - x )
d ) ( x - 7 ) - 2 ( 3x + 5 ) = 3
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a) -(2x - 1) = 4 b) 2t - (3t + 1) = 6 c) - (4 + x) = 2(3 - x )
-2x+1=4 2t - 3t - 1 = 6 - 4 - x = 6 - 2x
-2x=3 -t = 7 -10 = -x
x= -1,5 t = -7 x = 10
d) (x - 7) - 2 (3x + 5) = 3
x - 7 - 6x - 10 = 3
-5x - 17 = 3
-5x = 20
x = -4
a) -(2x-1)=4
-2x+1=4
-2x=4-1
-2x=3 / : (-2)
x= -1.5
b) 2t-(3t+1)=6
2t - 3t - 1=6
2t-3t=6+1
-t=7 /: (-t)
t=-7
c) -(4+x)=2(3-x)
-4-x=6-2x
-x+2x=6+4
x=10 /: x
x= 10
d) ( x - 7 ) - 2 ( 3x + 5 ) = 3
x-7-6x-10=3
x-6x=3+7+10
-5x= 20 / : (-5)
x= -4