31+4t-r=40

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Solution for 31+4t-r=40 equation:


Simplifying
31 + 4t + -1r = 40

Reorder the terms:
31 + -1r + 4t = 40

Solving
31 + -1r + 4t = 40

Solving for variable 'r'.

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

Add '-31' to each side of the equation.
31 + -1r + -31 + 4t = 40 + -31

Reorder the terms:
31 + -31 + -1r + 4t = 40 + -31

Combine like terms: 31 + -31 = 0
0 + -1r + 4t = 40 + -31
-1r + 4t = 40 + -31

Combine like terms: 40 + -31 = 9
-1r + 4t = 9

Add '-4t' to each side of the equation.
-1r + 4t + -4t = 9 + -4t

Combine like terms: 4t + -4t = 0
-1r + 0 = 9 + -4t
-1r = 9 + -4t

Divide each side by '-1'.
r = -9 + 4t

Simplifying
r = -9 + 4t

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