r+7=4-2r

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Solution for r+7=4-2r equation:


Simplifying
r + 7 = 4 + -2r

Reorder the terms:
7 + r = 4 + -2r

Solving
7 + r = 4 + -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 + r + 2r = 4 + -2r + 2r

Combine like terms: r + 2r = 3r
7 + 3r = 4 + -2r + 2r

Combine like terms: -2r + 2r = 0
7 + 3r = 4 + 0
7 + 3r = 4

Add '-7' to each side of the equation.
7 + -7 + 3r = 4 + -7

Combine like terms: 7 + -7 = 0
0 + 3r = 4 + -7
3r = 4 + -7

Combine like terms: 4 + -7 = -3
3r = -3

Divide each side by '3'.
r = -1

Simplifying
r = -1

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