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enot [183]
3 years ago
14

4m+5+5m+40=180 Help!!!

Mathematics
2 answers:
juin [17]3 years ago
8 0
4m+5m+40+5=180
9M+45=180
9m=180-45
9m=135
M= 135/9
M= 15
OLEGan [10]3 years ago
4 0

First, let's put all of the variables together.

4m + 5m + 5 + 40 = 180.

Add them.

M is the same multiplier, so we can add 4 and 5 together to make 9m.

Add 5 and 40.

9m + 45 = 180.

From here, we can go two ways. I will show the first way, which is my personal  preference.

We want to get rid of the coefficient on m to isolate it, so we must divide it by its coefficient. The coefficient on m is 9. So, divide m by 9. We must also divide everything else by 9.

9m/9 = 1m

45/9 = 5

180/9 = 20

Plug it in--

m + 5 = 20.

Subtract the 5 from both sides to isolate m.

m = 15.

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