7r-2=5(r-4)

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Solution for 7r-2=5(r-4) equation:


Simplifying
7r + -2 = 5(r + -4)

Reorder the terms:
-2 + 7r = 5(r + -4)

Reorder the terms:
-2 + 7r = 5(-4 + r)
-2 + 7r = (-4 * 5 + r * 5)
-2 + 7r = (-20 + 5r)

Solving
-2 + 7r = -20 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
-2 + 7r + -5r = -20 + 5r + -5r

Combine like terms: 7r + -5r = 2r
-2 + 2r = -20 + 5r + -5r

Combine like terms: 5r + -5r = 0
-2 + 2r = -20 + 0
-2 + 2r = -20

Add '2' to each side of the equation.
-2 + 2 + 2r = -20 + 2

Combine like terms: -2 + 2 = 0
0 + 2r = -20 + 2
2r = -20 + 2

Combine like terms: -20 + 2 = -18
2r = -18

Divide each side by '2'.
r = -9

Simplifying
r = -9

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