The answer would be 6x+25.
For this, we have to use the Distributive Property, which allows us to multiply the numbers inside of the parenthesis.
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So you would do 6•x which equals 6x. And then do 6•4 which equals 24. Your equation currently should be 6x+24+1. Lastly, add 24 and 1 to get your final answer of 6x+25.
I hope this helped :)