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1)
*^ ??? co to za skrót ???
2)
0.1x + 0.2 = 0.2x
-0.1x = -0.2 /*(-10)
x = 2
3)
6 - 2x = 2 + x
-3x = -4 /:(-3)
x = 0.75
4)
0.3x - 0.2x - 2 = 0
0.1x = 2 /*10
x = 20
5)
0.5x - 1.5 + 0.5x + 1.5 = 5
x = 5
Zadania:
1)
x - 2/3 = 2
x = 2 2/3
2) x/piąta jako ułamek?
x - 15 = 315
x = 300
3)
(0.5x+1.5)8 = x - 3
4x + 12 = x - 3
3x = -15 /:3
x = -5
4)
8x - 3 = 53
8x = 56 /:8
x = 7
5)
3x - 15 + 7 = x + 1
3x -8 = x + 1
2x = 9 /:2
x = 4.5