2(r-2)-4=40

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Solution for 2(r-2)-4=40 equation: 


Simplifying
2(r + -2) + -4 = 40

Reorder the terms:
2(-2 + r) + -4 = 40
(-2 * 2 + r * 2) + -4 = 40
(-4 + 2r) + -4 = 40

Reorder the terms:
-4 + -4 + 2r = 40

Combine like terms: -4 + -4 = -8
-8 + 2r = 40

Solving
-8 + 2r = 40

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 2r = 40 + 8

Combine like terms: -8 + 8 = 0
0 + 2r = 40 + 8
2r = 40 + 8

Combine like terms: 40 + 8 = 48
2r = 48

Divide each side by '2'.
r = 24

Simplifying
r = 24

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