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1.( 2x-1)+(1-x)
2.(2x-1)-(1-x)
3.3x +(2x+1)
4.3x - (2x+1)
1.( 2x-1)+(1-x)
2.(2x-1)-(1-x)
3.3x +(2x+1)
4.3x - (2x+1)
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Bab AljabarMatematika SMP Kelas VII
1] (2x - 1) + (1 - x)
= 2x - x - 1 + 1
= x
2] (2x - 1) - (1 - x)
= 2x + x - 1 - 1
= 3x
3] 3x + (2x + 1)
= 3x + 2x + 1
= 5x + 1
4] 3x - (2x + 1)
= 3x - 2x - 1
= x - 1