please help, is this correct?

Question

4.5-1.9M= 20.1 -.2M

steps

-1.9M+2M+4.5= 20.1
.1m+4.5=20.1
m= 15.6

Answer 1

You have 0.2M here
4.5-1.9M= 20.1 -.2M

but then change it to 2.0M here
-1.9M+2M+4.5= 20.1

4.5 - 20.1 = 1.9M - 0.2M
-15.6 = 1.7M
M= -9.17647

Answer 2

There's a problem in the last step. It should be:

.1m+4.5=20.1
m= 156

Also, as the above answer wrote, you seem to have changed the -.2M to -2M in the first step. If it was supposed to be -.2M, then that's a second problem.

Otherwise, though, you are going the right direction. ;-)

Answer 3

vlee seems to have it right.
[In his work, however, you might find the 2 steps done in his second equation somewhat hard to follow: He multiplied by -1. Then added to each side this ( -0.2M + 4.5) ]

Your original problem has - .2M as the right most term;
then in your work you rewrite it as +2M in your first line of solution.

Answer 4

no
-1.9M+2M+4.5= 20.1......should be + 0.2M
make it easier X by 10

Answer 5

No, this is wrong. On the line before the last it is

.1m+4.5=20.1. So, .1m = 0.1m =15.6. m = 15.6/1. = 156

You forgot the . To avoid this, put the zero before the .

Answer 6

to make it simpler, multiply all the terms by 10:
you get:
45 - 19M = 201 - 2M (now add 19M to both sides)
45 = 201 - 2M + 19M
45 = 201 + 17M (now remove 201 from both sides)
45 - 201 = 17M
-156 = 17M (now divide by 17)
M = -156/17 = -9.1764

you made one mistake in the first step in replacing .2M (=0.2M) by 2M
and the same mistake in the last step where .1M became 1M

Answer 7

4.5-1.9M= 20.1 - 0.2M
1.9m - 0.2m = 4.5 - 20.1
1.7m = -15.6
m = - 15.6/1.7 = - 9.176

Answer 8

4.5-1.9M= 20.1 - 0.2M
1.9m - 0.2m = 4.5 - 20.1
1.7m = -15.6
m = - 15.6/1.7 = - 9.176

Answer 9

-1.9M+0.2M = 20.1-4.5
-1.7M = 15.6
M = -9.18

Answer 10

Hi Lee!!!!

Yes your method and answer are correct.

Lenpol7