Simplify and solve this equation 4m plus 9 plus 5m-12 equals 42?

Does dodecahedron have triangular faces? What will happen as the temperature is gradually cooled at 10 degrees celsius? Who to write nine and fifty-three thousandths in standard form? What is 30-8? What is the difference between victor records and victrola records They have the same record numbers? You want to know how to calculate the square meters? How many 37s in 120? What is the measure of one interior angle of a 21-agon? What is point in math terms? What are all the odd composite numbers from 1 to 100? When you turn 15 how many months do you have to wait to get your permit? Why are there more than one currency? What is the mixed number for 35 over 3? What is a math problem that equals 29? What Is 1234 plus 567 plus 890? What can you multiply 3 times to get 36? What is 4.5 minus 1.5? How far does a car travel in 10 hours when its speed is 100k? What is 2.4086 in words? Is 12 inches too big?