SOLUTION: please help me solve this problem: 0.4m-3=-1

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Question 9340: please help me solve this problem: 0.4m-3=-1
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
0.4m - 3 = -1

Add +3 to both sides:
0.4m - 3 + 3 = -1 + 3
0.4m = 2

Next divide both sides by 0.4
0.4m%2F0.4+=+2%2F0.4

Move the decimal in the denominator one place to the right by multiplying numerator and denominator by 10. In other words, move the decimal in NUMERATOR and DENOMINATOR one place to the right.
m+=+2%2F0.4+=+20%2F4+=+5

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