solve 5m(7)=7(15m+1)?

2008-10-11 1:07 pm

回答 (13)

2008-10-11 1:52 pm
✔ 最佳答案
QUESTION: 5m(7)=7(15m+1)

35m=105m + 7 (Multiply the number to remove the brackets)

35m -105m = 7 (put the unknown on the left side and the numbers on the right side)

-70m = 7 (Work out each side)

m = 7/-70

m = -1/10 OR 0.1 (Simplify)
2008-10-11 1:23 pm
5m(7) = 7(15m + 1)
5m = 15m + 1
10m = - 1
m = - 1/10

Answer: m = - 1/10

Proof:
7(5[- 1/10]) = 7(15[- 1/10] + 1)
7(- 1/2) = 7(- 3/2 + 2/2)
- 7/2 = 7(- 1/2)
- 7/2 = - 7/2
2008-10-12 9:06 pm
5m(7)=7(15m+1)
35m=105m+7
35m-105m=7
-70m=7
m=-(7/70)
m= -1/10
Ans
2008-10-11 7:26 pm
5 m = 15 m + 1
- 1 = 10 m
m = - 1 / 10
2008-10-11 2:29 pm
» 5m (7) =7(15m+1)
» 35m =105m+7
» 105m-35m =-7
» -70m =7
» m =-(7/70)
=-1/10

Ans:- m=-1/10
2008-10-11 1:46 pm
5m(7)=7(15m+1)
35m=105m+7
35m-105m=7
-70m=7
m=7+70
m=77
2008-10-11 1:27 pm
5m (7) = 7 (15m+1)
=> 35m = 105m + 7
=> 35m - 105m = 7
=> -70m = 7
=> m = 7/-70
=> m = 1/-10
2008-10-11 1:22 pm
5m(7) = 7(15m + 1)
35m = 7*15m + 7*1
35m = 105m + 7
35m - 105m = 7
-70m = 7
m = 7/-70
m = -1/10 (-0.1)
2008-10-11 1:18 pm
5m(7)=7(15m+1)

first solve 7(15m+1) : * 7x15m=105m *7x1= 7
then multiply 5m(7)= 35m

35m=105m+7 .. So thats what you have

Move '105m' w/ 35m so it should look like this:

-105m+35m=7 (sign changes)

now subract -105m+35m since the signs are different u subtract and then take the sign of the larger number:

-70m=7

edit: so now u kno 5m(7)=7(15m+1) dont equal w/ each other.. then if u wanna solve for 'm' u move '-70' to the other side and divide w/ 7 to isolate 'm'

m=7/-70 *divide*
m= -0.1
2008-10-11 1:17 pm
1)Multiply* So U Get 35m =105m+7

2) Sub 105m From The Both Sides Of The Equation And U Will Get
-70m=7

3)By Solving The Equation U Will Get M= -0.1


* Multiply 5m With The 7 in the Brackets And (15m+1) With The 7 Outside The Brackets


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