What does x= in 3x-4=17

x = 7

Step-by-step explanation:

To find the value of x

Transpose

3x-4=17

3x = 17 +4

3x = 21

x = 21/3

x = 7

We can even cross check by replacing the value of x by 7

3 (7) - 4 = 17

21 - 4 =17

17 = 17

CROSS-CHECKED

80%

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: