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5x=3 | :5
x = 3/5
b) -x-1=-2x-2 |+2x
x -1 = -2 |+1
x = -1
c) 3y +3 = 2y | -3y
3 = -y | * (-1)
y = -3
d) -10 + 5y = -7y +7 |+10
5y = -7y +17 | +7y
12y = 17 |: 12
y = 17/12
f) -2x -6 +6x +3 -4 = 0
4x-7 = 0 | +7
4x = 7 | :4
x = 7/4
5x = 3 obustronnie dzielimy przez 5
x = 0,6
b) -x-1=-2x-2 obustronnie dodajemy x
- 1 = -x - 2 obustronnie dodajemy dwa
1 = -x
x= -1
c) 3(y+1)=2y
3y + 3 = 2y obustronnie odejmujemy 3y
3 = -y
-3=y
d) 5(-2+y)=7(-y+1)
-10 + 5y = -7y + 7 obustronnie dodajemy 10
5y = - 7 y + 17 / obustronnie dodajemy 7y
12y = 17 obustronnie dzielimy przez 12
y = 1,416
f) -2(x+3)-3(-2x-1)-4=0
-2x - 6 + 6 x + 3 - 4 = 0
4x - 7 = 0 obustronnie dodajemy 7
4x = 7 obustronnie dzielimy przez 4
x = 1,75