5r-12=4(r-5)

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Solution for 5r-12=4(r-5) equation:


Simplifying
5r + -12 = 4(r + -5)

Reorder the terms:
-12 + 5r = 4(r + -5)

Reorder the terms:
-12 + 5r = 4(-5 + r)
-12 + 5r = (-5 * 4 + r * 4)
-12 + 5r = (-20 + 4r)

Solving
-12 + 5r = -20 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-12 + 5r + -4r = -20 + 4r + -4r

Combine like terms: 5r + -4r = 1r
-12 + 1r = -20 + 4r + -4r

Combine like terms: 4r + -4r = 0
-12 + 1r = -20 + 0
-12 + 1r = -20

Add '12' to each side of the equation.
-12 + 12 + 1r = -20 + 12

Combine like terms: -12 + 12 = 0
0 + 1r = -20 + 12
1r = -20 + 12

Combine like terms: -20 + 12 = -8
1r = -8

Divide each side by '1'.
r = -8

Simplifying
r = -8

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