tolong dijawab, soalnya mau dikumpulin besok, mksh

1) 4(x + 1 ) = 2 ( x - 5 )
4x + 4 = 2x - 10
4x - 2x = - 10 - 4
2x = - 14
x = - 7


3) K = (x - 2 ) + ( x + 2 ) + ( 2x - 4 )
28 = 4x - 4
28 + 4 = 4x
x = 32 ÷ 4
x = 8
sisi terpendek = x - 2 = 8 - 2 = 6 cm