Odpowiedź:
a)
2x - 0,5(3x - 2) = 1,75
2x - 1,5x + 1 = 1,75
0,5x = 1,75 - 1 = 0,75
x = 0,75 : 0,5 = 1,5
b)
- 3(1/3y + 1 ) - 2 = 4(1 - y)
- y - 3 - 2 = 4 - 4y
- y + 4y = 4 + 3 + 2
3y = 9
y = 9 : 3 = 3
c)
0,7x + 1,2 = 4,5(1 - 1,4x) + 3
0,7x + 1,2 = 4,5 - 6,3x + 3
0,7x + 6,3x = 7,5 - 1,2
7x = 6,3
x = 6,3 : 7 = 0,9
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Odpowiedź:
a)
2x - 0,5(3x - 2) = 1,75
2x - 1,5x + 1 = 1,75
0,5x = 1,75 - 1 = 0,75
x = 0,75 : 0,5 = 1,5
b)
- 3(1/3y + 1 ) - 2 = 4(1 - y)
- y - 3 - 2 = 4 - 4y
- y + 4y = 4 + 3 + 2
3y = 9
y = 9 : 3 = 3
c)
0,7x + 1,2 = 4,5(1 - 1,4x) + 3
0,7x + 1,2 = 4,5 - 6,3x + 3
0,7x + 6,3x = 7,5 - 1,2
7x = 6,3
x = 6,3 : 7 = 0,9