solve 2/5y = -4/15 please help me?

2009-03-22 7:04 am
can someone help me with my math

回答 (9)

2009-03-22 7:15 am
✔ 最佳答案
....2y..........-4
------------ =--------
.....5...........15

30y=-20
y=-20/30 or -2/3 answer
參考: chech my answer here: http://www.myalgebra.com/algebra_solver.aspx
2009-03-22 11:50 pm
2/5y = -4/15

y = (-4/15) / (2/5)

= (-4/15) * (5/2)

= -20/30

= -2/3

Hope this helps.
2009-03-22 9:01 pm
You MUST present questions CLEARLY.
DO YOU MEAN :-

(2/5) y = - 4/15
2y = - 4/3
y = - 2/3

OR

2/(5y) = - 4/15
30 = - 20 y
y = - 3/2
2009-03-22 4:27 pm
2/5(y) = -4/15
2y/5 = -4/15
2y = 5(-4/15)
2y = -4/3
y = (-4/3)/2
y = (-4/3)(1/2)
y = -2/3
2009-03-22 2:14 pm
2 / 5y = -4 / 15

-> 2 = 5y(-4 / 15)

-> 2 = (-4y / 3)

-> 6 = -4y

-> y = 6 / -4

y = -3 / 2
2009-03-22 2:12 pm
the answer is -20/30 which can be reduced to -2/3.
2009-03-22 2:11 pm
Use cross-multiplication: -20y=30
y= -1.5
2009-03-22 2:09 pm
y=-2/3
2009-03-22 2:09 pm
assuming it's 2 over 5y...
divide both sides by 2/5...
y= -4/15 * 5/2
y = -10/30

you can take it from there


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