4=20+r

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Solution for 4=20+r equation:


Simplifying
4 = 20 + r

Solving
4 = 20 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
4 + -1r = 20 + r + -1r

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

Add '-4' to each side of the equation.
4 + -4 + -1r = 20 + -4

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

Combine like terms: 20 + -4 = 16
-1r = 16

Divide each side by '-1'.
r = -16

Simplifying
r = -16

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