7=1-2r

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Solution for 7=1-2r equation:


Simplifying
7 = 1 + -2r

Solving
7 = 1 + -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.
7 + 2r = 1 + -2r + 2r

Combine like terms: -2r + 2r = 0
7 + 2r = 1 + 0
7 + 2r = 1

Add '-7' to each side of the equation.
7 + -7 + 2r = 1 + -7

Combine like terms: 7 + -7 = 0
0 + 2r = 1 + -7
2r = 1 + -7

Combine like terms: 1 + -7 = -6
2r = -6

Divide each side by '2'.
r = -3

Simplifying
r = -3

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