a. -8 + (6 + n)=8 + 9
b. (n+13) +11 =16 +(13 + 11)
c. (-21 +n) ×13 =(21 × 13) +(7×13)
d.35 × (42 – 20) =(35 × n)-(35 × 20)
tolong jawab secepatnya
Tentukan nilai n!
Jawab:
a. n = 19
b. n = 16
c. n = 49
d. n = 42
Penjelasan dengan langkah-langkah:
a. -8 + (6 + n)=8 + 9
-8 + 6 + n = 8 + 9
-(8-6) + n = 17
-2 + n = 17
n = 17 + 2
n = 19
b. (n+13) +11 =16 +(13 + 11)
n + 13 + 11 = 16 + 13 + 11
n + 13 = 16 + 13
n = 16
Untuk c. dan d.
Gunakan sifat distributif…
a(b+c) = (a×b)+(a×c)
c. (-21 +n) ×13 =(21 × 13) +(7×13)
…………………… ruas kanan difaktor
13(n-21) = 13(21+7)
n-21 = 21+7
n = 21+21+7
n = 42 + 7
n = 49
d.35 × (42 – 20) =(35 × n)-(35 × 20)
35(42-20) = 35(n-20)
n = 42
(xcvi)
Penjelasan dengan langkah-langkah:
a. -8 + (6 + n)=8 + 9
-8 + (6 + n ) = 17
-2 + n = 17
n = 17 + 2
n = 19
b. (n+13) +11 =16 +(13 + 11)
n + 24 = 16 + 24
n + 24 = 40
n = 40 – 24
n = 16
c. (-21 +n) ×13 =(21 × 13) +(7×13)
n – 21 = 21 + 7
n – 21 = 28
n = 28 + 21
n = 49
d.35 × (42 – 20) =(35 × n)-(35 × 20)
n = 42