-9=-4+5(4r-5)

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Solution for -9=-4+5(4r-5) equation:


Simplifying
-9 = -4 + 5(4r + -5)

Reorder the terms:
-9 = -4 + 5(-5 + 4r)
-9 = -4 + (-5 * 5 + 4r * 5)
-9 = -4 + (-25 + 20r)

Combine like terms: -4 + -25 = -29
-9 = -29 + 20r

Solving
-9 = -29 + 20r

Solving for variable 'r'.

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

Add '-20r' to each side of the equation.
-9 + -20r = -29 + 20r + -20r

Combine like terms: 20r + -20r = 0
-9 + -20r = -29 + 0
-9 + -20r = -29

Add '9' to each side of the equation.
-9 + 9 + -20r = -29 + 9

Combine like terms: -9 + 9 = 0
0 + -20r = -29 + 9
-20r = -29 + 9

Combine like terms: -29 + 9 = -20
-20r = -20

Divide each side by '-20'.
r = 1

Simplifying
r = 1

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