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The algebric expression will become:
2[x + (x+3)] = 78
And you get the answers after the solution.
answered 1 year ago
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Try it like this: Let x be the shorter side, so the longer side will be x+3......you have two short sides and two long sides...so you have x+x+x+3+x+3=78...That looks a little simpler to me, but the teacher will probably prefer Aisha's way.
answered 1 year ago
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