Homework help-Algebra problems?!

question one: -1=b/4-7
you must simplify the denominator that is 4-7 which is 3, then you will get -1=b/3, then cross multiply that is 3*-1 you will get -3 and therefore your answer is -3.

question two: x/6+4=15
you do the same, simplify the denominator then find your answer, 6+4=10, then cross multiply 10*15=150 therefore x=150.

hope i helped you

I'm not sure which problem you have here b/c you forgot to use parenthesis

It could be:
-1 = (b/4) - 7
or
-1 = b/(4-7)

The second one has the same issue without the parenthesis

It could be:
(x/6) + 4 = 15
or
x/(6+4) = 15

If you put the parenthesis in we can answer them for you. I'll check back in later.

EDIT* I'll solve these equations the two different ways and you can use which one it was meant to be.

-1 = (b/4) -7; add 7 to each side
-1 + 7 = (b/4) - 7 + 7; simplify
6 = b/4; times both sides by 4
6 * 4 = (b/4)*4; simplify
24 = b <------------Answer

-1 = b/(4-7); subtract first
-1 = (b/-3); times both sides by -3
-1*(-3) = (b/-3)*-3; simplify
3 = b; switch it around
b = 3 <-----------Answer

(x/6) + 4 = 15; subtract 4 from both sides
(x/6) + 4 - 4 = 15 - 4; simplify
(x/6) = 11; times both sides by 6
(x/6)*6 = 11 * 6; simplify & solve
x = 66 <-----------Answer

x/(6 + 4) = 15; add
x/10 = 15; times both sides by 10
(x/10)*10 = 15*10; simplify & solve
x = 150 <---------Answer


Blessings