its the day befofe valentines day and shelly needs to get valentine cards for all of her classmates the desks are arranged in a rectangle 7 rows wide and 5 rows long if there are 3 desks that are empty how many students are in the class

21

Step-by-step explanation:

(7x2)+(5x2)-3=21

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1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation: