Right im a bit retarded when it comes to Maths, Prob somthing to do with me not getting along with the teacher i had for it in comp and i had the same teacher right through

Anyway got a simultainous equation to do and not sure if i got it right, so just want someone to tell me what they got for it

4a+6b=181
4a+2b=100

I know its simple as as the top and bottom both have same number etc but i just want to double check i got the right answer other wise it fooks up a load of other stuff