Answer:
The coefficient is 1
Step-by-step explanation:
The coefficient is the number the variable is being multiplied by (the number is front of the variable). Variables with nothing in front of them are being multiplied by one (basically the one is implied) the equation could also be written as 1m+7.5.
*more examples if you need them*
x+6=12
coefficient=1
4x-2
coefficient=4