Makakuha ng mabilis at malinaw na mga sagot sa IDNStudy.com. Ang aming komunidad ay handang magbigay ng malalim at maaasahang mga sagot, anuman ang kahirapan ng iyong mga katanungan.

Anna baked some muffins. Her kids ate 1/10 of them and gave 2/3 of the remaining muffins to her nieces. If she had 9 muffins left, how many muffins did
she bake?


Sagot :

Total muffins: x
Muffins kids ate: (1/10)(x)
Muffins given to nieces: (2/3) (9/10)(x) or (3/5) (x)
Muffins left:  9 muffins

Equation:
x - (x/10 + 3x/5) = 9
x - (x/10 + 6x/10) = 9
x - (7x/10) = 9
(10) (x) - 7x = 9 (10)
10x - 7x = 90
3x = 90
3x/3 = 90/3
x = 30

ANSWER: She baked 30 muffins.

Check:
Total muffins: x = 30 muffins
Muffins kids ate: (1/10) (30) = 3 muffins
Muffins given to nieces: (2/3) (27) = 18 muffins
Muffins left = 9 muffins

3 + 18 + 9 = 30
30 = 30