4y-5=7-7y could you explain too plz so i can understand.I was confused with all negatives. I remember2 of the multiple choices were -11/12 , 11/12 not sure what other 2 was. any help would be great thx
2007-06-14 13:02:00 · 6 answers · asked by nik 2 in Science & Mathematics ➔ Mathematics
4y - 5 = 7 - 7y
bring all the y terms to one side of the equation and all the free terms to the other
4y - 5 + 7y = 7 - 7y + 7y (adding 7y to both sides)
11y - 5 = 7 then add 5 to both sides
11y - 5 + 5 = 7 + 5
11y = 12
11y/11 = 12/11 (divide both sides by 11
y = 12/11
2007-06-14 13:06:53 · answer #1 · answered by koalahash 3 · 0⤊ 0⤋
When you are starting out, take everything slowly and do every step.
4y - 5 = 7 - 7y
Get all the y values on one side by adding or subtracting to cancel out on the other.
4y + 7y - 5 = 7 - 7y + 7y
11y - 5 = 7
11y - 5 + 5 = 7 + 5
11y = 12
11y * 1/11 = 12 * 1/11
y = 12/11
2007-06-14 13:07:17 · answer #2 · answered by TychaBrahe 7 · 0⤊ 0⤋
4y - 5 = 7 - 7y
bring all the y terms to one side of the equation and all the free terms to the other
4y + 7y = 7 + 5
11y = 12
y = 12/11
2007-06-14 13:08:51 · answer #3 · answered by jurassicko 4 · 0⤊ 0⤋
4y-5=7-7y
11y=12 collect like terms- so you would add 5 to 7 and add 7y to 4 y
y=12/11 divide 12 by 11 and solve for y
2007-06-14 13:06:53 · answer #4 · answered by Chongor 3 · 0⤊ 0⤋
4y-5=7-7y subtract 4y
-5=7-11y subtract 7
-12=-11y divide -11
y=12/11 and since you have a negative in the numerator and
in the denominator it cancels out and becomes positive. you are trying to isolate the y by either subtracting,adding, diving, multiplying to both sides.
2007-06-14 13:12:13 · answer #5 · answered by Anonymous · 0⤊ 0⤋
you should move the ys to the same side by adding 7 y to both sides
11y-5=7
add 5 to both sides
11y=12
divide both sides by 11.... and
y=12/11 or 1 1/11
2007-06-14 13:09:24 · answer #6 · answered by packingslip 2 · 0⤊ 0⤋