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3x - 2x = 4
x = 4
1). 3x = 3 x 4 = 12
2). 2x = 2 x 4 = 8
Jadi, jumlahnya 12 + 8 = 20
Nomor 2
49 3/2 = 101/2 = 50,5
Nomor 3
8 akar 10
4 x 2 akar 10
4 akar 4 x 10
4 akar 40
k3/5 - k2/5= 4
k1/5 = 4
k= 4 x 5
k = 20 (b)
nomor 2
49 x 3/2
= 98 X 3
2
= 147 (c)
nomor 3
√8 × √10
= √4 × √2 × √2 × √5
= √4 × √4 × √5
= √16 × √5
= 4√5 (b)