plis jawab besok di kumpulkan

14. 2x+3=15
      2x=15-3
      2x=12
      x=6

x-2=?
6-2=4 
jawabannya B.4

5) 25¼
= 25,25
= 2,525 • 10¹

6) ( 25 × 10 ) ÷ 50
= 250 ÷ 50
= 5

7) 1 + ½ × ¼
= 1 + ⅛
= 8/8 + ⅛
= 9/8

8) A

9) B

10) soal g jelas

11) soal g jelas

12) ( 4x - 2y + 3 ) + ( 2x + 5y - 3 )
= 6x + 3y

13) 3 ( 2x + ⅓) = 4 ( 3x - ½ )
6x + 1 = 12x - 2
6x - 12x = - 1 - 2
- 6x = - 3
x = -3/-6
x = ½

14) 2x + 3 = 15
2x = 15 - 3
2x = 12
x = 6
nilai x - 2
= 6 - 2
= 4

15) K = 2 × ( p + l )
56 = 2 × ( 3x + 2 + 2x + 1 )
56 ÷ 2 = 5x + 3
28 = 5x + 3
5x = 28 - 3
5x = 25
x = 5
jadi
p = 3x + 2 = 3(5) + 2 = 17
l = 2x + 1 = 2(5) + 1 = 11
L = p × l
= 17 × 11
= 187 cm²