Answer:
84
Step-by-step explanation:
In equation 2.5m=210, you must isolate the variable, m, by dividing 2.5 from both sides. On the side of the variable, 2.5 will cancel out 2.5 leaving you with x=210/2.5. Now you can simplify by dividing 210 by 2.5 leaving you with x=84. Hope this helps.