2007-10-23 10:08:49 · 6 answers · asked by Andres A 1 in Science & Mathematics ➔ Mathematics
8+7=9m-4m
15=5m
m=3
2007-10-23 10:48:47 · answer #1 · answered by ? 2 · 1⤊ 0⤋
8+4m=9m-7
4m = 9m -7 + (-8)
4m + (-9m) = -7 -8
-5m = -15
m = -15/ (-5)
m = 3
CHECK:
8+4m=9m-7
8 +4(3) = 9(3) -7
8 +12 = 27 -7
20 = 20
YES
2007-10-23 10:12:11 · answer #2 · answered by David F 5 · 1⤊ 0⤋
15 = 9m - 4m
15 = 5m
m = 3
2007-10-23 10:45:37 · answer #3 · answered by Como 7 · 1⤊ 0⤋
put the m's and the numbers on the other side so you have:
9m-4m=5m
8+7=15
so 5m=15
divide both sides by 5
m=3
2007-10-23 10:13:35 · answer #4 · answered by healthspot_2000 4 · 1⤊ 0⤋
8+4m-9m+7=0
15-5m=0
-5m=-15
m=-15/-5
m=3
2007-10-23 10:12:23 · answer #5 · answered by freeky 2 · 1⤊ 0⤋
I'd help but previous answers explains it all correctly.
2007-10-23 10:17:15 · answer #6 · answered by yessenia 3 · 0⤊ 0⤋