-7=-7-2r

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Solution for -7=-7-2r equation:


Simplifying
-7 = -7 + -2r

Add '7' to each side of the equation.
-7 + 7 = -7 + 7 + -2r

Combine like terms: -7 + 7 = 0
0 = -7 + 7 + -2r

Combine like terms: -7 + 7 = 0
0 = 0 + -2r
0 = -2r

Solving
0 = -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
0 + 2r = -2r + 2r
Remove the zero:
2r = -2r + 2r

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

Divide each side by '2'.
r = 0

Simplifying
r = 0

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