Question

3x-18=39 solve equations with variables

Answer 1

Solve for x:
3 x - 18 = 39

Add 18 to both sides:
3 x + (18 - 18) = 18 + 39

18 - 18 = 0:
3 x = 39 + 18

39 + 18 = 57:
3 x = 57

Divide both sides of 3 x = 57 by 3:
(3 x)/3 = 57/3

3/3 = 1:
x = 57/3
The gcd of 57 and 3 is 3, so 57/3 = (3×19)/(3×1) = 3/3×19 = 19:
Answer:  x = 19