Combining like terms, we get:
(3r + 7r + 1) + (4r - 8r - 2) = (10r - 1) + (-4r - 2)
Now we can simplify further by adding the coefficients of the like terms:
(10r - 1) + (-4r - 2) = 6r - 3
Therefore, (3r + 7r + 1) + (4r - 8r - 2) simplifies to 6r - 3.
2 2
(3r +7r+1)+(4r -8r-2)
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