a.|2x|=20 b.6|x+2|=18 c.|3x-1|=2x d.|x|=2x-1
Matematika
cmeysya
Pertanyaan
a.|2x|=20
b.6|x+2|=18
c.|3x-1|=2x
d.|x|=2x-1
b.6|x+2|=18
c.|3x-1|=2x
d.|x|=2x-1
1 Jawaban
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1. Jawaban rahayunawangsari
a.
2x = 20
x = 20/2
x =10
b.
6 (x+2) = 18
6x + 12 = 18
6x = 18-12
6x = 6
x = 6/6
x = 1
c.
3x - 1 = 2x
3x - 2x = 1
1x = 1
x = 1
d.
x = 2x - 1
1 = 2x - x
1 = x