The difference of 4 times a number and 7 is 21. Find the number.

The number is 7.

Step-by-step explanation:

4n - 7 = 21                  Add 7 on both sides

   4n = 28                       Isolate the variable by dividing 4 on both sides

       n= 7

the answer is d

the answer is in the first quadrant, which make the y-int positive.

since the dots are going down, therefore the correlation is negative

i hope it is right.

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: