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2. 3x=4
x= 4/3
3. 7x-4x = 20+4
3x = 24
x = 8
4. 6y-6 = 4x +2
4x-6y+8 = 0
5. 1/2x + 2.5 = 1/3 x- 1
3/6x - 2/6x =-1-2.5
1/6x = -3.5
x =- 21
penyesaian dari y + 4 <19
= 5 + 4 < 19
= 9 < 19
y= 10
10 + 4 < 19
14<19
y=15
15+ 4 < 19
19<19
y= 10
20+ 4 <19
24<19
2. penyelesaian dari 6+3x=10
=3x = 10-6
3x = 4
x = 4/3
3. 7x-4=4x+20
7x-4x = 20 +4
3x = 24
x =24/3
x=8
4. 3 (2y-2) =4x +2
6y -6 =4x +2
6y-4x = 2+6
6y-4x = 8
5. 1/2 (x+5) = 1/3 (x-3)
1/2 x +5/2 = 1/3x -1
1/2 x -1/3 x = -1 -5/2
1/6 x = -7/2
x = -7/2 . 6/1
= -21