Answer:
2(x+4)-1=2x+7 is true for everything
Explanation:
2(x+4)-1
2(x+4)
=2x+2*4
=2x+8
=2x+8-1
=2x+7
2x+7=2x+7
2x=2x
2x-2x=2x-2x
0=0
true for all x
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