Find the sum of $8 p q + 8 - 2 q r and - 7 p q - 2 + 2 q r$

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Solution

Finding the sum of algebraic expression
We find the sum of algebraic expression by the horizontal method
To add two or more algebraic expressions,
$(8 p q + 8 - 2 q r) +(- 7 p q - 2 + 2 q r) = 8 p q + 8 - 2 q r + - 7 p q - 2 + 2 q r = 8 p q - 7 p q - 2 q r + 2 q r + 8 - 2 = p q + 4$ (Group the like terms together)
Hence, the sum of an algebraic expression is $p q + 4$ .

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