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2p = 5 + 13
p = 18/2
p = 9
b. 3t = 4-t
3t+t = 4
4t = 4
t = 1
c.3a + 4 = 12 - a
3a + a = 12 - 4
4a = 8
a = 2
d.a + 1 = 9/7
a = 9/7 - 1
a = 9/9 - 7/7
a = 2/7
e.1/2 (x - 5) = 3x + 15
1/2x-5/2 = 3x + 15
1/2x-3x = 15 + 5/2
-5/2x = 35/2
70x = - 10
x = -1/7
2.tentukan nilai x yang menjadi penyelesaian dari setiap persamaan berikut!
a.4x - 14 = 2(5 - 2x)
4x - 14 = 10 - 4x
4x+ 4x = 10+14
8x = 24
x = 3
b.5x + 4 = 3(3x + 8)_
5x + 4 = 9x + 24
5x - 9x = 24 - 4
-4x = 20
x = -5
c.2(3x - 7) = 6 - 4x
6x - 14 = 6 - 4x
10x = 20
x = 2
d.3(2x + 10) = x -5
6x + 30 = x -5
-5x = 35
x = -7
3.tentukan nilai x yang menjadi penyelesaian dari persamaan berikut!
a.x - 13 = 1/4x + 5
x + 1/4x = 5 + 13
3/4 x = 18
3x = 72
x = 24
b.(x + 3) = 1/4(3x -1)
x + 3 = 3/4 x - 1/4
1/4x = - 11/4
x = -11
c.15/4 - 3/y = 6/y
15/4= 6/y + 3/y
15/4 = 9/y
y =36/15 -----> 12/5
d.13/6 + 1/3y = 9/y
13/6 = 9/y - 1/3y
13/6 = 27 /3y- 1/3y
13/6 = 26/3y
39y = 156
y = 156/39
y = 52/13