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25xy is an equivalent expression.
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If you mean: (2x+2)(5x-5) then it is equivalent to 10x^2 -10
5(x + y)
5(x-y) is also equivalent to 5x-5y
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It is: 5x+31
Without an equality sign the given terms can't be considered as equations but if you mean -2x = 10 and -5x = 25 then they are both equivalent inasmuch that the value of x in both equations works out as -5
you would first do 10+5x-5=0, then 5x+5=0 and is factored by 5(x+1)=0. or if you want to know what x equals with, x=-1
5x-5 = -3 5x = -3+5 5x = 2 x = 2/5
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