5m + 9 = 3 (m-5) +7
2007-01-11 15:48:30 · 9 answers · asked by Jennifer 1 in Science & Mathematics ➔ Mathematics
5m+9=3m-15+7
5m+9=3m-8
5m+17= 3m
17= -2m
m= -17/2
2007-01-11 15:52:53 · answer #1 · answered by 7 · 1⤊ 0⤋
(you have to distribute the 3 into (m - 5)
5m + 9 = 3m -15 + 7
(add like terms)
5m + 9 = 3m - 8
(combine coefficients, remember to always have the coefficient with the letter positive, so in this case we would move the 3m to the left sice 5 is larger than 3)
2m + 9= -8
(we want to isolate the 2m so subtract 9 from both sides)
2m = - 17
(finally divide both sides by 2 to isolate the m)
m= - 17/2 or 8 1/2
2007-01-11 23:58:34 · answer #2 · answered by mayra 1 · 0⤊ 0⤋
5m + 9 = 3 (m-5) +7
5m +9 = 3m -15 +7
5m -3m = -15+7 -9
2m = -17
m = - 8.5
2007-01-12 02:10:52 · answer #3 · answered by Ms. M 3 · 0⤊ 0⤋
5m + 9 = 3 (m-5) +7
5m + 9 = 3m - 15 + 7
5m - 3m = -15 + 7 - 9
2m = -17
m = -17/2 or -8,5
solved!!
2007-01-11 23:55:03 · answer #4 · answered by fortman 3 · 0⤊ 0⤋
5m + 9 = 3 (m-5) +7
5m +9 = 3m -15 +7
5m -3m = -15+7 -9
2m = -17
m = - 8.5
I did not understand what the :D means.
2007-01-12 00:00:42 · answer #5 · answered by ironduke8159 7 · 0⤊ 0⤋
distribute the 3
5m + 9= 3m - 15 +7
put like terms on one side
5m - 3m = -15 +7 - 9
combine like terms
2m = -17
divide by 2 to solve for m
m = -17/2
2007-01-11 23:59:23 · answer #6 · answered by Anonymous · 0⤊ 0⤋
5m + 9 = 3(m-5) + 7
5m + 9 = 3m - 15 + 7
5m + 9 = 3m -8
5m = 3m - 17
2m = -17
m = -8.5
2007-01-11 23:53:30 · answer #7 · answered by Anonymous · 0⤊ 0⤋
5m + 9 = 3m - 15 + 7
5m - 2m = -8 -9
2m = -17
m = -17/2= -8.5
m= -8.5
2007-01-12 01:02:06 · answer #8 · answered by shreya i 2 · 0⤊ 0⤋
5m+9=3(m-5)+7
5m+9=3m-15+7
5m+9=3m-8
5m-3m=-8-9
2m=-17
m=-17/2
m=-8.5
2007-01-11 23:55:31 · answer #9 · answered by HARITHA SREE 1 · 0⤊ 0⤋