Respuesta :

Answer:

Step-by-step explanation:

21) 64=8(r+2)

Step 1: Simplify both sides of the equation.

64=8(r+2)

64=(8)(r)+(8)(2)(Distribute)

64=8r+16

Step 2: Flip the equation.

8r+16=64

Step 3: Subtract 16 from both sides.

8r+16−16=64−16

8r=48

Step 4: Divide both sides by 8.

8r

8

=

48

8

r=6

29) Step 1: Simplify both sides of the equation.

−4(r+6)=−63

(−4)(r)+(−4)(6)=−63(Distribute)

−4r+−24=−63

−4r−24=−63

Step 2: Add 24 to both sides.

−4r−24+24=−63+24

−4r=−39

Step 3: Divide both sides by -4.

and you get r= 39\4

hope that helps

jackiejarrell45

Answer:  r = 6

Step-by-step explanation:

64= 8(r+2)

64/8  = 8(r+2) / 8  divide both sides by 8

    8 = r + 2       The eights cancel out

- r = 2 + 8         Move the variable to the left and change its sign

- r = - 6             to get id of the negative -r make  the 6 a positive

 r=6

-4(r + 6) = -63

- 4r - 24 = -63    Distribute 4 through ( ) -4 x4  -4 x6

-4r =63 + 24      Move -24 to the right (making it a positive )

-4r = 39

-4r / -4 = 39 /4  divide both sides by -4

r= 39/4  

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