I'm assuming you need to evaluate/simplify the equation, so you need to isolate/get x by itself in the equation:
2(3x + 1) = 11 Divide by 2 on both sides
3x + 1 =
[11/2 or 5.5] Subtract by 1 on both sides
[make the denominator the same to combine fractions]
3x =
Divide by 3 on both sides
x =
0.3 x 103 = 30.9
0.3 x 1025 = 307.5
3 x 10^5 = 300,000
The answer is 31 add 14 and 7 then subtract 52 by the 21 thus giving 31