Answer:

Step-by-step explanation:
move the variable to the right(-2x) and change the sign(2x now) -3y=-12+2x then change the signs (-3y is 3y , -12 is 12 and then 2x becomes -2x again) then divide both sides of the equation by 3 so 12÷3=4 and -2x÷3=
then you're going to use the commutative property to reorder the terms . so your answer is 
Answer:1380
Step-by-step explanation: 12x115
300mm (obvious) 3m converted into mm is 300mm it cant be any number else only if the 3 changes as a 3.5m so that's 0.0035 (my teacher taught me this so It cant be wrong)