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- 0,3x- 0,4 x = -2,1`
- 0,7x = -2,1
x = (-2,1) : (-0,7)
x = 3
L(3) = 2,1- 0,3*3 = 2,1 - 0,9 = 1,2
P(3) = 0,4*3 = 1,2
L(3) = P(3)
d)-1,5x-3=0,2x+6
-1,5x - 0,2x = 6 +3
- 1,7x = 9
x = 9 : (-1,7)
x = 9* (-10/17)
x = - 90/17
L(-90/17) = (-15/10*(-90/17) - 3 = 135/17 - 51/17= 84/17 = 4 i 16/17
P(-90/17) = 2/10*(-90/17) + 6 = - 18/17 +102/17 = 84/17 = 4 i 16/17
L(-90/17) = P(-90/17)