5 answers
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take the square root of both sides to get
±(x-7) = ±(x+3) which resolves into
x+7 = x+3 or x+7 = -x-3
the first gives no solution but the second part yields
x = 2
Check:
Left side = (2-7)^2
=(-5)^2
=25
Right side = (2+3)^2
= 25
so x=2 is the correct solution