r-4=7-9-8

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Solution for r-4=7-9-8 equation: 


Simplifying
r + -4 = 7 + -9 + -8

Reorder the terms:
-4 + r = 7 + -9 + -8

Combine like terms: 7 + -9 = -2
-4 + r = -2 + -8

Combine like terms: -2 + -8 = -10
-4 + r = -10

Solving
-4 + r = -10

Solving for variable 'r'.

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

Add '4' to each side of the equation.
-4 + 4 + r = -10 + 4

Combine like terms: -4 + 4 = 0
0 + r = -10 + 4
r = -10 + 4

Combine like terms: -10 + 4 = -6
r = -6

Simplifying
r = -6

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