Question 55730
2x+9=4x-29
subtract 4x & 9 from both sides. 
2x-4x=-29-9
combine the numeric and unknown terms
-2x=-38
divide both sides by -2
x=-38/-2
divide -28 by -2
x=19
proof
2*19+9=4*19-29
38+9=76-29
47=47