How do you do this. The directions say solve and check the equation. Begin work y rewriting the equation without fractions.
the problem is
7y/15 -5 = y/5 -1
please show you work so that i understand this problem.
thanks.
2007-07-08 16:22:47 · 5 answers · asked by Chris S 2 in Science & Mathematics ➔ Mathematics
The most important rule is to get rid of all those pesky fractions.
How can you do this? Try multiplying everything by 15. Then:
7y - 75 = 3y - 15
so
4y = 60
so
y = 15
Hope this helps.
.
2007-07-08 16:27:25 · answer #1 · answered by tsr21 6 · 0⤊ 0⤋
Multiply each side by 15.
1. Solve for y
15 (7y/15 - 5) = 15 (y/5 - 1)
7y - 75 = 3y - 15
7y - 3y = -15 + 75
4y = 60
y = 15
2. Check answer
7(15) /15 - 5 = 15/5 - 1
7 - 5 = 3 - 1
2 = 2
15 is the correct answer.
2007-07-09 00:11:07 · answer #2 · answered by kayedimanche 2 · 0⤊ 0⤋
7y/15 - 5 = y/5 -1
multiply by 15 on both sides:
7y - 5*15 = y*3 - 15
7y - 75 = 3y -15
7y - 3 y -75 = 3y - 3y - 15
4y -75 = -15
4y = -15 + 75 = 60
y = 60/4 = 15
2007-07-08 23:29:52 · answer #3 · answered by ? 6 · 0⤊ 0⤋
7y/15 -5 = y/5 -1
Multiply by 15 getting:
7y -75 =3y -15
7y -3y = 75-15
4y = 60
y = 15
2007-07-08 23:30:06 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
i assume u mean
(7y/15)-5=(y/5)-1
multply both sides by 15
7y-75=3y-15
4y=60
y=15
2007-07-08 23:28:06 · answer #5 · answered by Anonymous · 0⤊ 0⤋