MATH please help
posted by Dan .
Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each subject.
Please help and show work it would be great thanks i really need help thanks

Number failed math is M
number failed ELA is E
E=2M
42EM+4=7 Think on that first.
422MM=3
3M=39
M=13
E=26 
thanks