Don't worry! Inequalities are my thing!
30b+53≥18b−83
First since 30b and 18b are on different sides, you cobine like terms. on each side!
18b - 18b = 0 I'm putting that on the other side.
30b - 18b = 12b
So far we have 12b + 53≥-83
Now we do 53 - 53 = 0 and do that to the other side as well.
-83 - 53 = -136
Now we have 12b ≥ -136
Now in order for the b be by itself is to divide 12/12 = 0 and to the other side -136/12 = -11.333...
And for the best part ----- Answer is
b ≥ -11.333...