-84=-4(4r+1)

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Solution for -84=-4(4r+1) equation:


Simplifying
-84 = -4(4r + 1)

Reorder the terms:
-84 = -4(1 + 4r)
-84 = (1 * -4 + 4r * -4)
-84 = (-4 + -16r)

Solving
-84 = -4 + -16r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '16r' to each side of the equation.
-84 + 16r = -4 + -16r + 16r

Combine like terms: -16r + 16r = 0
-84 + 16r = -4 + 0
-84 + 16r = -4

Add '84' to each side of the equation.
-84 + 84 + 16r = -4 + 84

Combine like terms: -84 + 84 = 0
0 + 16r = -4 + 84
16r = -4 + 84

Combine like terms: -4 + 84 = 80
16r = 80

Divide each side by '16'.
r = 5

Simplifying
r = 5

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