Write an expression to represent the perimeter of a rectangle with the length of x -4 and width of 2x +8.
2 answers:
Answer:
2(x-4) + 2(2x+8) OR long way (x-4) + (x-4) + (2x+8) + (2x+8)
Step-by-step explanation:
2(x-4) represents the (x-4) + (x-4) in the longer version since for perimeter you add the sides. Same thing for the other side, 2(2x+8) represents (2x+8) + (2x+8).
Not sure if you need the expression solved but here:
To get from first line to second, use distributive property. To get from second to third line, combine like terms.
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If the two equations have the same solution, they will have the same x value that makes them true. So solve for x for both equations and see if they are equal:
Because both equations have the same x value, they have the same solution.
Because both equations have the same x value, they have the same solution.