Hasil penjumlahan dari 3(x+2y) dan 2(y-5x) adalah... A.13x+8y B.8x+4y C.9y-8x D.8y-7x

3(x+2y)+2(y-5x)
=3x+6y+2y-10x
=3x+10x+2y+6y
=13x+8y

Jawab :

3(x + 2y) + 2(y - 5x)
= 3x + 6y + 2y - 10x
= 3x - 10x + 6y + 2y
= -7x + 8x
= 8y - 7x



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