Question

Nomor:
11
14
15
16
17
18
19

tolong Bantu jawabb :))

Answer 1

11.
3t + 4 = 2(t + 11)
3t + 4 = 2t + 22
3t - 2t = 22 - 4
t = 18

12.
2y = 3(5 - y)
2y = 15 - 3y
2y + 3y = 15
5y = 15
y = 3

13.
10(p - 6) = -5p
10p - 60 = -5p
10p + 5p = 60
15p = 60
p = 4

14.
5(z - 4) = 3(8 - z)
5z - 20 = 24 - 3z
5z + 3z = 24 + 20
8z = 44
z = 5,5

15.
3n - 2 = 6 -(8 + 3x)
3n - 2 = 6 - 8 - 3x
3n + 3x = -2 + 2
3n + 3x = 0
3(n + x) = 0
n + x = 0
n = 0 - x
   = -x

3n + 3x = 0
3(-x) + 3x = 0
-3x + 3x = 0
0 = 0

16.
5(6 - r) + 1 = p + 1
30 - 5r + 1 = p + 1
-5r - p = 1 - 1 - 30
-5r - p = -30
-(5r + p) = -30
5r + p = 30*

*apabila r = p
5r + p = 30
5r + r = 30
6r = 30
r = 5

*apabila r ≠ p, maka hasilnya tetap 5r + p = 30

18.
3(2x - 3) -2(1 - x) - (x + 1) = 0
6x - 9 - 2 + 2x - x - 1 = 0
7x - 12 = 0
7x = 12
x = 12/7

19.


Untuk soal no. 16 - 17 ada kesalahan soal