Tolong bantu :) dikumpulkan sekarang soalnya

1a) tinggi bdn andi = x - 4
b) A + J = 328
x - 4 + x = 328
2x = 328 + 4
2x = 332
x = 166 cm
c) tinggi bdn andi = 166 - 4 = 162 cm
tinggi bdn jonru = 166 cm

4) misal
bil 1 = x
bil 2 = y
x + y = 53
- x + y = 9
----------------(+)
2y = 62
y = 31
x + y = 53
x + 31 = 53
x = 53 - 31
x = 22
b) bil 1 = 22
bil 2 = 31

5) a) K = 2 × ( p + l )
76 = 2 × ( 4x - 1 + 3x + 4 )
76 = 2 × ( 7x + 3)
7x + 3 = 76 ÷ 2
7x + 3 = 38
7x = 38 - 3
7x = 35
x = 5
b) p = 4x - 1 = 4•5 - 1 = 20 - 1 = 19
l = 3x + 4 = 3•5 + 4 = 15 + 4 = 19