1.) 15y + 5y + 2y
=22y
2.) (18x + 2y) + (-10x -2y)
= 18x + 2y -10x -2y
= 8x
3.) (2+2+1) + (2+4+1)
= 5 + 7
= 12
4.) 120 -100 n
= 20n
4.) (2a + 2y ) - (-8a -y)
= 2a + 2y + 8a + y
= 10a + 3y
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Answers & Comments
1.) 15y + 5y + 2y
=22y
2.) (18x + 2y) + (-10x -2y)
= 18x + 2y -10x -2y
= 8x
3.) (2+2+1) + (2+4+1)
= 5 + 7
= 12
4.) 120 -100 n
= 20n
4.) (2a + 2y ) - (-8a -y)
= 2a + 2y + 8a + y
= 10a + 3y