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Verified answer
Mapel : MatematikaKelas : VII SMP
Bab : Aljabar
Pembahasan :
1A) -2x + 1 - (6x + 4)
= -2x + 1 - 6x - 4
= -8x - 3
B) 10x - 3 - 3(2x + 5)
= 10x - 3 - 6x - 15
= 4x - 18
————————————————
2A) 5x - 7 + 7 - 2x
= 3x
2B) 3(2x - 5) + 2(3x + 5)
= 6x - 15 + 6x + 10
= 12x - 5
Verified answer
1.a) (-2x+1)-(6x+4)
= -2x+1-6x-4
= -8x-3
b) 2(3x+5)-3(2x-5)
= 6x+10-6x+15
= 25
2.
a) 5x-7+7-2x
= 3x
b) 3(2x-5)+2(3x+5)
= 6x-15+6x+10
= 12x-5