How do solve $sqrt(x+7)+2=4$ ?

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Answer 1 · 2015-09-14T06:48:27

$x=-3$

$sqrt(x+7)+2=4$

Subtract $2$ from both sides.

$sqrt(x+7)=4-2$

$sqrt(x+7)=2$

Square both sides of the equation.

$(sqrt(x+7))^2=2^2$

$x+7=4$

Subtract $7$ from both sides.

$x=4-7$

$x=-3$

How do solve sqrt(x+7)+2=4sqrt(x+7)+2=4?