-6x^2 - 78x - 252
Improved answer:
-6x+6x+7
When simplified = 7
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Simple,its just like this: 6x+1+7-3 =6x+8-3 =6x+5
6x+7 = -56x = -12x = -2
If: 9x+7 = 6x+25 Then: x = 6
55 = 6x + 7 so 48 = 6x so 8 = x
6x-4+7=-5 6x+3=-5 6x=-8 x=-8/6 = -4/3