x*2+49=14x????????????? 10 points?

x² - 14x + 49 = 0
(x - 7)² = 0
x = 7

Alternatively, you can use the Quadratic Equation to get the same answer, if you don;t know how to factorise.

x² - 14x + 49 = 0
(x - 7)(x - 7) = 0
x = 7

x^2 + 49 = 14x
x^2 - 14x + 49 = 0
x^2 - 7x - 7x + 49 = 0
(x^2 - 7x) - (7x - 49) = 0
x(x - 7) - 7(x - 7) = 0
(x - 7)(x - 7) = 0

x - 7 = 0
x = 7

∴ x = 7