Tracy, Danielle and Sherri bought snacks for a girls’ sleepover. Tracy bought 4 bags of pretzels, 4 liters of soda, and 6 chocolate bars and paid $21. Danielle bought 3 bags of pretzels, 2 liters of soda, and 10 chocolate bars and she paid $20.88. Sherri picked up 2 bags of pretzels, 3 liters of soda, and 4 chocolate bars and she ended up paying $13.17.

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

x ≥ 18 is your answer

step-by-step explanation:

let "a number" = x

(2/3)x + 17 ≥ 29

isolate the variable (x). do the opposite of pemdas (parenthesis, exponent (& root), multiplication, division, addition, subtraction).

first, subtract 17 from both sides.

(2/3)x + 17 (-17) ≥ 29 (-17)

(2/3)x ≥ 29 - 17

(2/3)x ≥ 12

next, multiply 3/2 to both sides to isolate the x

(3/2)(2/3)x ≥ 12(3/2)

x ≥ 12(3/2)

simplify. multiply, then divide

x ≥ (12 * 3)/2

x ≥ (36)/2

x ≥ 18

x ≥ 18 is your answer

~

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this