5(2y-1)=3(y-4)?

2008-07-18 3:11 pm

回答 (10)

2008-07-18 3:16 pm
✔ 最佳答案
5(2y - 1) = 3(y - 4)
-> 10y - 5 = 3y - 12,
-> 10y - 3y = -12 + 5,
-> 7y = -7,
So, y = -1....
2008-07-18 10:23 pm
5(2y - 1) = 3(y - 4)
10y - 5 = 3y - 12
10y - 3y = 5 - 12
7y = - 7
y = - 1

Answer: y = - 1

Proof:
5(2[- 1] - 1) = 3([- 1] - 4)
5(- 2 - 1) = 3(- 1 - 4)
5(- 3) = 3(- 5)
- 15 = - 15
2008-07-18 10:15 pm
Breaking out the brackets you will get:
10y-5=3y-12
Bringing the 'y's to the left side and the numbers on the right side, you will get:
10y-3y=-12+5
7y=-7
Hence, y= -1
2008-07-18 10:14 pm
5(2y-1)=3(y-4)
or10y-5=3y-12
or10y-3y=5-12
or7y= -7
or y= -7/7= -1 ans
2008-07-18 10:14 pm
10y-5=3y-12
7y=-7
y=-1
2008-07-18 10:56 pm
5(2y - 1) = 3(y - 4)
5*2y - 5*1 = 3*y - 3*4
10y - 5 = 3y - 12
10y - 3y = 5 - 12
7y = -7
y = -7/7
y = -1
2008-07-18 10:38 pm
5(2y-1)=3(y-4)
10y-5=3y-12
10y-3y= -12+5
7y= -7
y= -1
參考: my brain
2008-07-18 10:38 pm
10 y - 5 = 3y - 12
7y = - 7
y = - 1
2008-07-18 10:28 pm
5(2y-1)=3(y-4)
10y-5=3y-12
7y=-7
y=-1
2008-07-18 10:17 pm
5(2y-1)=3(y-4)
10y-5=3y-12
-3y -3y
_________
7y-5=-12
+5 +5
________
7y=-7
/7 /7
y=-1


Tina


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