Find the solution to the equation
a. no solutions
b. a = 4/3
c. a = 100/3
d. a = 20
2007-01-02 15:25:04 · 14 answers · asked by KCoop01 1 in Science & Mathematics ➔ Mathematics
The answer is D. 3/4a+5=20. 3/4a=20-5. 3/4a=15. Divide 3/4 from each side to separate the variable. Divide 3/4 from 15. You get the answer of a=20.
2007-01-02 15:32:12 · answer #1 · answered by econloren 3 · 1⤊ 1⤋
3/4a = 20 - 5 => 3/4 a = 15 => a = 4/3 x 15 => a = 20 = d
2007-01-02 15:34:21 · answer #2 · answered by BUFF D 1 · 0⤊ 1⤋
None of the above.
In the equation 3/4a + 5 = 20 a = 5
So: 3/45 (= 15) + 5 = 20
15 + 5 = 20
Again, the answer is that a = 5
2007-01-02 16:16:43 · answer #3 · answered by Adios 7 · 0⤊ 0⤋
Assuming a is the unknown (starting letters of the alphabet are usually used for constants, last letters are used for variables), combine and rearrange terms:
3/4a=20-5
3=(20-5)4a
a=3/60
a=1/20
None of the answers offered are correct using the statement as offered. If the statement were
(3/4)a +5=20, then a=(4/3)15, or 20.
2007-01-02 15:45:43 · answer #4 · answered by James R, the seeker 1 · 1⤊ 0⤋
hmm.. first off, is the equation 3/(4a) + 5 = 20 or (3/4)a + 5 = 20?
if it's the first case, then the following happens:
3/(4a) = 15
3 = 60a
a = 3/60 = 1/20
but if it's the second case, then you will have:
(3/4)a = 15
a = 15(4/3) = 20 <---- which is D
2007-01-02 15:31:40 · answer #5 · answered by january 2 · 2⤊ 0⤋
3/4a +5 -20 =0
4[3/4a + 5 - 20 = 0 ]
3a + 20 -80 =0
3a -60 =0
3a =60
a =20
2007-01-02 16:00:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋
a. Eliminate fractions - multiply the denominators by everything:
4a(3/4a) + 4a(5) = 4a(20)
First: cancel "like" terms >
3 + 20a = 80a
Sec: subtract 20a from both sides > opposite side means opposite sign >
3 + 20a - 20a = 80a - 20a
3 = 60a
Third: solve for "a" by keeping it on one side > divide both sides by 60 >
3/60 = 60a/60
3/60 = a > a = 3/60
*Simplify into a = 1/20
Since 1/20 isn't listed, neither of the choices are the correct answer.
2007-01-02 15:33:18 · answer #7 · answered by ♪♥Annie♥♪ 6 · 0⤊ 0⤋
Multiply both sides by 4 to get rid of the fractions:
4(3/4a+5)=4(20)
3a+20=80
Subtract 20 from both sides:
3a=60
Divide 3 from both sides:
a=20
Check:
3/4(20)+5=20
15+5=20
20=20
The answer is d.
2007-01-02 15:32:38 · answer #8 · answered by Anonymous · 0⤊ 1⤋
the answer is d --- A=20
3/4a+5=20 (subtract 5 from both sides)
3/4a=15 divide out 3/4 from both sides.
a=20
2007-01-02 15:30:57 · answer #9 · answered by daddyspanksalot 5 · 1⤊ 1⤋
d. a=20
minus 15 from both sides
3/4a=15
divide by 3/4 on both sides
a= 15/ (3/4)
a= 15* 4/3
a=20
2007-01-02 15:30:03 · answer #10 · answered by Anonymous · 1⤊ 1⤋