Question

Tolong dibantu no 7-9

Answer 1

jawabn nomer 7 (oleh)
= ( 5z +3 ) - ( 2z-7)
= 5z + 3 -2z +7
= 3z +10

jawaban nomer 8 (dari)
(x-y) - (6x+4)
= x -y -6x -4
= -5x -y - 4

jawabn nomer 9  ( bentuk fariebel bebas )
jawabn soal a
sisi = 2a + 3
kliling = 4 ( 2a + 3)
         = 8a + 12

jawabn soal b
panjng = 9b + 6
lebar = 3b + 3
kliling = 2 ( p + l )
          = 2 ( 9b + 6 +3b + 3)
          = 2 ( 12b + 9)
          = 24b + 18

jawaban soal c
b = 18 c
a = 6 c
kliling = 2 ( 18c + 6c)
         = 2 ( 24c)
         = 48 c