7r+8=-10+r-2+2r

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Solution for 7r+8=-10+r-2+2r equation:


Simplifying
7r + 8 = -10 + r + -2 + 2r

Reorder the terms:
8 + 7r = -10 + r + -2 + 2r

Reorder the terms:
8 + 7r = -10 + -2 + r + 2r

Combine like terms: -10 + -2 = -12
8 + 7r = -12 + r + 2r

Combine like terms: r + 2r = 3r
8 + 7r = -12 + 3r

Solving
8 + 7r = -12 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
8 + 7r + -3r = -12 + 3r + -3r

Combine like terms: 7r + -3r = 4r
8 + 4r = -12 + 3r + -3r

Combine like terms: 3r + -3r = 0
8 + 4r = -12 + 0
8 + 4r = -12

Add '-8' to each side of the equation.
8 + -8 + 4r = -12 + -8

Combine like terms: 8 + -8 = 0
0 + 4r = -12 + -8
4r = -12 + -8

Combine like terms: -12 + -8 = -20
4r = -20

Divide each side by '4'.
r = -5

Simplifying
r = -5

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