what are the answers to these problems?:
22=11+x over -4?
a over -5 + 2 -13
-28+ -9x+17
16= c over 20+19
n over 15 - 13=-18
Do as many as you like or all of them and please show your work cuz i don't get this. If you do them all I will give you a best answer!!!
2007-05-14 11:45:58 · 5 answers · asked by ♥ (: 4 in Science & Mathematics ➔ Mathematics
People are getting different answers because they are interpreting the questions differently. Pay close attention to what assumptions were made by the answerer and whether the answers they gave really go with the questions you meant to ask.
22 = 11 + x/-4
22 (-11) = 11 (-11) + x/-4 << subtract 11 from both sides
11 = x/-4
11 (*-4) = x/-4 (*-4) << multiply -4 by both sides
x = -44
a/-5 + 2 - 13
a/-5 + (2-13)
a/-5 + (-11)
a/-5 -11 << adding a negative number is the same as subtracting
-a/5 - 11 << dividing by a negative number makes the whole expression negative (a/-5 = -a/5)
This is probably the simplest answer, but you can also factor out a -1 and express it as:
-(a/5 + 11)
-28 + -9x + 17
-9x + (17 + -28) << commutitive property
-9x + (17 - 28) << adding negative same as subtraction
-9x + -11
-9x - 11 << adding negative same as subtraction
This is also probably the simplest answer, but you can also express it as -(9x+11).
16 = c/20 + 19
16 (-19) = c/20 + 19 (-19) << subtract 19 from both sides
-3 = c/20
-3 (*20) = c/20 (*20) << multiply both sides by 20
c = -60 << negative times positive equals negative
n/15 - 13 = -18
n/15 - 13 (+13) = -18 (+13) << add 13 to both sides
n/15 = -5 << -18 + 13 is the same as 13 - 18
n/15 (*15) = -5 (*15) << multiply both sides by 15
n = -75 << negative times positive equals negative
Hope this helps!
2007-05-14 12:02:35 · answer #1 · answered by JaniesTiredShoes 3 · 0⤊ 0⤋
22 = 11 + x/4
88 = 44 + x
x = 88-44 = 44
a/(-5) + 2 - 13 = -a/5 + 2(5)/5 - 13(5)/5 = (-a+10-65)/5
= -(a+55)/5
-28 - 9x + 17 = -11 - 9x
16 = c/20 + 19
c/20 = 16 - 19 = -3
c = -3(20) = -60
n/15 - 13 = -18
n/15 = -18 + 13 = -5
n = -5(15) = -75
2007-05-14 11:53:33 · answer #2 · answered by kellenraid 6 · 0⤊ 0⤋
I hope I'm reading this right:
22 = 11 + x/4 ...
multiply both sides by 4 to get 88 = 44 +x
subtract 44 from both sides, and you get x = 44.
a/5 + 2 = 13 (I'm guessing that's an "=" not a "-")
multiply both sides by 5 to get a + 10 = 65.
subtract 10 from both sides to get a = 55.
-28 + 9x = 17 (again I'm guessing about the "=" sign)
add 28 to both sides to get 9x = 45,
divide both sides by 9 to get your answer.
16 = c/20 + 19
multiply both sides by 20 ... 320 = c + 380
subtract 380 from both sides to get c = -60
n/15 - 13 = -18
multiply both sides by ... you guessed it, 15, which gives you
n - 195 = -270
add 215 to both sides to get n = -75
2007-05-14 11:57:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
22 = 11+x/-4
multiply by -4
-88 = 11+x
subtract 11
-99 = x
a/(-5+2-13)
a/(-16)
-28+9x+17+????
-11 + 9x = ????
16 = c/(20+19)
16 = c/39
mulitply by 39
16*39 = c
624 =c
n/(15-13)=-18
c/(2) = -18
mulitply by 2
c=-18*2
c=-36
2007-05-14 11:50:47 · answer #4 · answered by danjlil_43515 4 · 0⤊ 1⤋
Heres the first one:
22 = (11+x)/-4
-88 = 11+x
x + -99
Its very simple algebra.
2007-05-14 11:51:05 · answer #5 · answered by Lady Geologist 7 · 0⤊ 0⤋