103=-7(1+3r)-r

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Solution for 103=-7(1+3r)-r equation:


Simplifying
103 = -7(1 + 3r) + -1r
103 = (1 * -7 + 3r * -7) + -1r
103 = (-7 + -21r) + -1r

Combine like terms: -21r + -1r = -22r
103 = -7 + -22r

Solving
103 = -7 + -22r

Solving for variable 'r'.

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

Add '22r' to each side of the equation.
103 + 22r = -7 + -22r + 22r

Combine like terms: -22r + 22r = 0
103 + 22r = -7 + 0
103 + 22r = -7

Add '-103' to each side of the equation.
103 + -103 + 22r = -7 + -103

Combine like terms: 103 + -103 = 0
0 + 22r = -7 + -103
22r = -7 + -103

Combine like terms: -7 + -103 = -110
22r = -110

Divide each side by '22'.
r = -5

Simplifying
r = -5

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