(r-3)=8(r-4)

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Solution for (r-3)=8(r-4) equation:


Simplifying
(r + -3) = 8(r + -4)

Reorder the terms:
(-3 + r) = 8(r + -4)

Remove parenthesis around (-3 + r)
-3 + r = 8(r + -4)

Reorder the terms:
-3 + r = 8(-4 + r)
-3 + r = (-4 * 8 + r * 8)
-3 + r = (-32 + 8r)

Solving
-3 + r = -32 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
-3 + r + -8r = -32 + 8r + -8r

Combine like terms: r + -8r = -7r
-3 + -7r = -32 + 8r + -8r

Combine like terms: 8r + -8r = 0
-3 + -7r = -32 + 0
-3 + -7r = -32

Add '3' to each side of the equation.
-3 + 3 + -7r = -32 + 3

Combine like terms: -3 + 3 = 0
0 + -7r = -32 + 3
-7r = -32 + 3

Combine like terms: -32 + 3 = -29
-7r = -29

Divide each side by '-7'.
r = 4.142857143

Simplifying
r = 4.142857143

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