Tentukan himpuan dari persamaan

1)
x+5 = 3
x = 3-5
x = -2

2)
2x-3 = 5
2x = 5+3
2x = 8
x = 8:2
x = 4

3)
x+1+2x = 7
3x = 7-1
3x = 6
x = 6:3
x = 2

4)
3x+4 = x-8
3x-x = -8-4
2x = -12
x = -12 : 2
x = -6

5)
2/3 x – 9 = 8
2/3 x = 8+9
2/3 x = 17
x = 17:2/3
x = 17.3/2
x = 51/2
x = 25 1/2

6)
x-7+2x-5 = 5
-x-12 = 5
-x = 5+12
-x = 17
x = -17

7)
2x+4-3-x = -1
x+1 = -1
x = -1-1
x = -2

8)
5x+10 = x²+2x
x²+2x-5x-10 = 0
x²-3x-10 = 0
(x-5)(x+2) = 0
x-5 = 0
x = 5
atau
x+2 = 0
x = -2

1.X+5=3
X=3-5
X=-2
2.2x-3=5
2x=5+3
2x=8
x=8÷2
x=4
3.x+1+2x=7
3x=7-1
3x=6
x=2
4.3x+4=x-8
3x-x=-8-4
2x=-12
x=-6