Solve 7b = 4(b + 30) for b

How to solve with steps:

First, distribute to parenthesis - ex. 4(b + 30) you would multiply b and 30 by 4.

Second, combine like terms - ex 7b and 4b are like terms. When combining like terms that are on different sides of the equal sign, you use inverse operations ( + becomes - and - becomes + ) so 7b - 4b is 3b.

Third, combine constants - ex constants are numbers without variables. If you have any, combine them.

Your equation now looks like this
3b = 120

Finally divide both sides of the equal sign by your coefficient (the number in front of the variable)

120 / 3 = 40

So b = 40

Hope this explanation helps!