Jawaban:
2.l2x+1l=4
syarat 1
2(2x+1)=4
4x+2=4
4x=4-2
4x=2
x=1/2
syarat 2
2(-(2x+1))=4
2(-2x-1)=4
-4x-2=4
-4x=4+2
-4x=6
x=-3/2
no 2
pakai yg ini
a=-(a-4)
a=-a+4
2a=4
a=2
-a=a-4
-a-a=-4
-2a= -4
a= 2
kesimpulam a = 2
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Jawaban:
2.l2x+1l=4
syarat 1
2(2x+1)=4
4x+2=4
4x=4-2
4x=2
x=1/2
syarat 2
2(-(2x+1))=4
2(-2x-1)=4
-4x-2=4
-4x=4+2
-4x=6
x=-3/2
no 2
pakai yg ini
a=-(a-4)
a=-a+4
2a=4
a=2
pakai yg ini
-a=a-4
-a-a=-4
-2a= -4
a= 2
kesimpulam a = 2