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a. 9×-s = -54
-9s= -54
s= -54/-9
=6
test:
9×-6= -54
--54= -54
b. -120/s=-5
-120 =-5s
-120/-5=s
24=s
s=24
test:
-120/(24) =-5
--5
c. s/14 =-3
s=14×-3
s=-72
test:
(-72)/14 =-3
d.(-4+4)×5=s×(-5+5)
-20+20 =-5s+5s
0=0
test:
karena hasilnya 0 variebel s boleh diganti apa aja
(-4+4)×5=10(-5+5)
-20+20=-50+50
0=0
e. -s/(-35)/7=5
-s=5×7×35
s= -1225
test:
-1225/(-35)/7=5
5=5
9)
a. p×6 = 89×(-18+18)
6p= -1602+1602
p= 0/6
p=0
b.(-4×62)×p = (-4×62)
248p=248
p=248/248
p=1
c.6×(21-7) =(6×21) - (5×p)
126-42 =126 - 5p
84= 126 -5p
-42= -5p
-42/-5=p
8,4=p
p=8,4
d.-8×-9 =(-8×12)+(p×-8)
72 = -96 - 8p
96+72 = - 8p
168 = -8p
168/-8 =p
-21 =p
p= - 21