If 3x + 7 = 5x + 1, then the numerical value of $$(x + 4)^2$$ is
Expression : 3x + 7 = 5x + 1
=> $$5x - 3x = 7 - 1 = 6$$
=> $$x = \frac{6}{2} = 3$$
To find : $$(x + 4)^2$$
= $$(3 + 4)^2 = (7)^2 = 49$$
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