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0,6 = -0,33x + 0,75x
0,6 = 0,42x/:0,42
x ≈1,4
b) 3x - 4 = 5x + 2
3x - 5x = 2 + 4
-2x = 6/:(-2)
x = -3
c) 7 - 2x = 7x - 2
- 2x - 7x = -2 - 7
-9x = -9/:(-9)
x = 1
d) 0, 66 ( 6x - 9) = 12
3,96x - 5,94 = 12
3,96x = 12 + 5,94
3,96x = 17,94/:3,96
x ≈ 4,5
e)0,5x + 4 = -6
0,5x = -6 - 4
0,5x = -10/:0,5
x = 20
-0,75x +0,33 x = - 0,6
- 0,42 = - 0,6 /: (-0,42)
x= 1,42 w przyblizeniu)
b)3x-4=5x+2
3x-5x= 2 +4
-2x=6 / : (-2)
x= -3
c) 7-2x= 7x- 2
-2x - 7x= -2 -7
-9x= - 9 / : (-9)
x= 1
d)0, 66 ( 6x - 9) = 12
3,96 x -5,94 = 12
3,96 x = 12 + 5,94
3,96x = 17,94/ : 3,96
x= 4,53( w przybliżeniu)
e)
0,5x + 4 = -6
0,5x= -6-4
0,5x=-10 / : 0,5
x = - 20