Answer:
7x + 3x - 6
Explanation:
So we're asked to write an equation that gives the total number of cookies delivered.
We Know: Holly baked 7 dozen chocolate chip cookies and 3 dozen oatmeal cookies but before she delivered them, her family ate 4 oatmeal cookies and 2 chocolate chip cookies.
First things first, what's a dozen?
A dozen is equivalent to 12
so if I were to say I made 3 dozen donuts each day, that means I made 36 donuts per day because 3 × 12 = 36
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Now that we know what's a dozen, let's calculate how many chocolate chip cookies Holly baked and how many oatmeal cookies Holly baked!
7 dozen = 7 × 12 = 84 (chocolate chip cookies)
3 dozen = 3 × 12 = 36 (oatmeal cookies)
36 - 4 = 32 (her family ate 4 oatmeal cookies so therefore we subtract 4 from 36)
84 - 2 = 82 (her family ate 2 chocolate chip cookies so therefore we subtract 2 from 84)
Equation: 7x + 3x - 6 where x represents dozen
7x + 3x - 6
7(12) + 3(12) - 6
84 + 36 - 6
120 - 6
114 (which is the total number of cookies delivered)