-7=-7+r

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Solution for -7=-7+r equation:


Simplifying
-7 = -7 + r

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

Combine like terms: -7 + 7 = 0
0 = -7 + 7 + r

Combine like terms: -7 + 7 = 0
0 = 0 + r
0 = r

Solving
0 = 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.
0 + -1r = r + -1r
Remove the zero:
-1r = r + -1r

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

Divide each side by '-1'.
r = 0

Simplifying
r = 0

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