Question

three times the quantity five minus a end quantity minus seven is less than thirteen

Line 1: three times five minus three times a minus seven is less than thirteen
Line 2: fifteen minus three a minus seven is less than thirteen
Line 3: fifteen minus seven minus three a is less than thirteen
Line 4: eight minus three a is less than thirteen
Line 5: eight minus three a minus eight is less than thirteen plus eight
Line 6: negative three a is less than twenty-one
Line 7: negative three a divided by negative three is greater than twenty-one divide

Answer 1

what did she do wrong