3b = - 6
b = - 6 ÷ 3
b = - 2
a + b = 3
a + ( - 2 ) = 3
a - 2 = 3
a = 3 + 2
a = 5
= 5 + 2 ( - 2 )
= 5 - 4
= 1
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3b = - 6
b = - 6 ÷ 3
b = - 2
a + b = 3
a + ( - 2 ) = 3
a - 2 = 3
a = 3 + 2
a = 5
Nilai a + 2b
= 5 + 2 ( - 2 )
= 5 - 4
= 1