these are fractions
solve for y
2007-04-22 11:11:30 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
3/5 + 5y = 7y - 14/15
15(3/5) + 15(5y) = 15(7y) - 15(14/15)
9 + 75y = 105y - 14
9 + 75y - 75y = 105y - 14 - 75y
9 = 30y - 14
9 + 14 = 30y - 14 + 14
23 = 30y
23 / 30 = 30y / 30
23 / 30 = y
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2007-04-22 11:42:39 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
3/5+5y=7y-14/15 subtract 5y from each side
3/5=2y-14/15 add 14/15 to each side
3/5+14/15=2y get LHS in LCD
9/15+14/15=2y combine like terms
23/15=2y divide both sides by 2
y=23/30
2007-04-22 18:20:04 · answer #2 · answered by yupchagee 7 · 0⤊ 0⤋
multiply everything by 5/1
3+25y=35y-70/15
multiply everything by 15
45+375y=525y-70
add 70 to both sides
115+375y=525y
subtract 375y from both sides
115=150y
divide by 150
23/30=y
2007-04-22 18:19:43 · answer #3 · answered by peacedove94 2 · 0⤊ 0⤋