Answer:
a) 8x +6a
b) 5p +7q
Explanation:
These expressions are simplified by combining "like terms." That means adding the coefficients of terms with the same variable.
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a)
3x +2a +5x +4a = (3 +5)x +(2 +4)a = 8x +6a
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b)
7p +6q -2p +q = (7 -2)p +(6 +1)q = 5p +7q