Simple.....
you have this fraction...

simplify...
42/6=7
and
60/7=10
Thus...

Thus, she has saved

of the money.
Answer:
what is this
Step-by-step explanation:
She earns 20 dollars as a carpenter and 25 dollars as a blacksmith
b+c=30 hours since she works 30 hours a week
25b+20c=690 since she earns 690 dollar totally and earns 25 dollars an hour as a blacksmith and 20 dollars an hour as a carpenter
lets multiply b+c=30 by -20
-20b-20c=-600
if we substract that from
25b+20c=690
5b=90
b=18 she worked as a blacksmith for 18 hours
Answer:
y = 110/3 or 36.6 (the 6 is infinite so make a line over it when entering the answer)