Thread: math help solve radical

I have a problem that I can't seem to solve, and its driving me crazy.

Here it is:

Simplify:

x times the square root of 7 plus 4 = 2x

Thanks in advance for some hints on how to solve this

Originally Posted by shag1818

I have a problem that I can't seem to solve, and its driving me crazy.

Here it is:

Simplify:

x times the square root of 7 plus 4 = 2x

Thanks in advance for some hints on how to solve this

x*sqrt(7)+4 = 2x

2x - x*sqrt(7) = 4

x(2-sqrt(7)) = 4

x= 4/(2-sqrt(7))