Question

Mahi spends 1/7 of her income on rent,

1/5 on groceries and saves the rest.
If she saves Rs 345, what is her monthly income?

plz...... answer it fast.....!!!!!!
detailed......

Answer 1

1/7 + 1/5 = 7/35 + 5/35 = 12/35. To total,rent + groceries
1 - 12/35 = 35/35 - 12/35 = 23/35 the fraction which she save
23/35 = 345/x solve this as a proportion
23x= 41310
X = $1796.09