Mathematics
Add:
(a) 2x, 5x
(b) 7p, −2p
(c) 2a + 4b, 9a + 10b
(d) 2xy, 3yx
(e)
Algebra Basics
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Answer
(a) 2x + 5x = (2 + 5)x = 7x.
(b) 7p + (−2p) = (7 − 2)p = 5p.
(c) (2a + 4b) + (9a + 10b)
= (2a + 9a) + (4b + 10b)
= 11a + 14b.
(d) 2xy + 3yx = 2xy + 3xy = (2 + 3)xy = 5xy.
(e)
Hence, the sum is .
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