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Answer:
0
Explanation:
-7 and 7 cancel out, and 5x and -5x cancel out too.
0+0=0
adding -7 to 7, since they are both constants (no variable) gives you 0. Adding -5x and 5x since they both have an x term gives you 0x also written as 0 (0*any number is 0). this gives you a final answer of 0
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