tentukan hasil pengukuran bentuk aljabar berikut.

42n+35m+7+50m+20n-9
=(42-20)n+(35+50)m-9
=22n+85m-9

(42n+35m+7)-(-50m-20n+9)
=42n+35m+7+50m+20n-9
=42n+20n+35m+50m+7-9
=62n+85m-2

(5x+3)-(x-1)
=5x+3-x+1
=5x-x+3+1
=4x+4

(2y+15z)-(4y-8)
=2y+15z-4y+8
=2y-4y+15z+8
=-2y+15z+8

maaf kalo sala