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x = 14/2
x = 7
2). 3/4 x = -3/8
x = -3/8 x 4/3
x = -1/2
3). 2y + 5 = 27
2y = 27 - 5
2y = 22
y = 22/2
y = 11
4). 4x - 8 = 6x + 12
4x - 6x = 12 + 8
-2x = 20
x = 20/-2
x = -10
5). 2 ( x + 3) + 3 ( x - 4) = 9
2x + 6 + 3x - 12 = 9
2x + 3x = 9 - 6 +12
5x = 15
x = 15/5
x = 3
6). 5y - 3 ( 2y - 6 ) = 2 ( 3y - 10 )
10y² - 30y - 6y + 18 = 6y - 20
10y² - 36y + 18 = 6y-20
10y² - 36y - 6y = -20 -18
10 y² - 42y = -38
7). x - 5 = 2
x = 2+5
x = 7
8). 2p = -10
p = -10/2
p = -5
9). 1/2 ( 4q - 5 ) = q + 5 1/4
2q - 5/2 = q + 21/4
2q -q = 21/4 + 5/2
q = 31/4
q = 7 3/4
10). 3/4 ( x + 3 ) + 1/2 ( x - 1) = 0
3/4x + 9/4 + 1/2x - 1/2 =0
3/4x + 1/2x = -9/4 + 1/2
5/4x = -7/4
x = -7/4 x 4/5
x = -7/5
11). 1/2 (4-n) -1/3 (1 + n) = 0
2-1/2n - 1/3 - 1/3n = 0
-1/2n - 1/3n = -2 + 1/3
-5/6n = -5/3
n = -5/3 x -6/5
n = 6/3
n = 2
12). 6,2x - 2,1 = 5,3
6,2x = 5,3 + 2,1
6,2x = 7,4
x = 7,4/ 6,2
x = 1,2
13).
no.6 sama 13 belum ya...