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  1. n=22

    Step-by-step explanation:

    Step 1: Simplify both sides of the equation.


    Step 2: Add 9 to both sides.



  2. n = -4

    Step-by-step explanation:

    Start off by remembering PEMDAS which first P means parenthesis so use distributive property to multiply the 2n + 4 by the 3 in front of it and do the same to the n + 1 and multiply that by the 5 in front which turns your question into 6n+12-2=1+5n+5 so now i'd combine like terms on both sides which now gives you 6n + 10 = 5n +6 so now to get the n on one side i'm going to sub tact it from both sides doesnt matter which one you do but to make it easier i'd subtract the 5n from the 6n because the whole point is to solve for n and by doing that you'd already be getting it by itself. so now the question should look like n + 10 = 6 so subtract 10 from both sides to isolate the n and you get your answer n = -4

  3. Let's solve your equation step-by-step.


    Step 1: Subtract 78 from both sides.



    Please put brainliest!

  4. N = - 4

    Step-by-step explanation:

    3 (2n+4)-2=1+5(n+1

    distribute 3 through the paretheses


    add the numbers


    move constant to the right-hand side and change its sign


    calculate the difference

    n = - 4

  5. 33.72

    Step-by-step explanation:

    To figure out the answer, we need to find the total area of the rectangle, and then subtract the blank shape.

    Lets first find the area of the rectangle. 4x10=40

    Lets now find the area of the blank shape. We fill caculate the area of the circle and then divide by 2 because it is a half circle. 4/2=2. 2x2=4. 4x3.14= 12.56/2=6.28

    40-6.28= 33.72

  6. -4

    Step-by-step explanation:


    add 10 to -10 to get rid of it, and to 10 because whatever you do to one side, you have to do to the other


    divide -5 into 20

    x = -4

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