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b)x= 3,50
c)a= 1
d)x= -2,2
e)x= -3 ( równanie jest sprzeczne 0=-3)
11x - 3(x-3) = 4x - 3[2(x-1)+3]
11x-3x+9=4x-3[2x-2+3]
8x+9=4x-6x+6-9
8x+9=-2x-3
10x=-12 /:10
x=-1,2
b)
4(1-0,5y) = 0,25 - 2,5(0,4y-0,1)
4-2y=0,25-y+0,25
-y=0,5-4
-y=-3,5 /*(-1)
y=3,5
c)
a/3 +a/2 + 1 = 1/6 /*6
2a+3a+6=1
5a=1-6
5a=-5 /:5
a=-1
d)
2b/3 - 3b/2 - 1 = 5/6 /*6
4b-9b-6=5
-5b=5+6
-5b=11 /:(-5)
b=-2,2
e)
1/2 - [2(c+1)]/3 = (c-2)/3 + 1/3 /*6
3-4(c+1)=2(c-2)+2
3-4c-4=2c-4+2
-6c=-4+3
-6x=-1 /:(-6)
x=1/6