Answers

  • Brainly User
2015-12-12T11:37:11+08:00

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
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

0