X+12=30 i dont understand how to solve it plzz

x+12 = 30

subtract 12 from each side

x+ 12-12 = 30 -12

x = 18

Answer x=18

can you add an image ?

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11