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Simplifying 14r + -16r + -1(-11r) + -4r = (-20) Remove parenthesis around (-11r) 14r + -16r + -1 * -11r + -4r = (-20) Multiply -1 * -11 14r + -16r + 11r + -4r = (-20) Combine like terms: 14r + -16r = -2r -2r + 11r + -4r = (-20) Combine like terms: -2r + 11r = 9r 9r + -4r = (-20) Combine like terms: 9r + -4r = 5r 5r = (-20) 5r = -20 Solving 5r = -20 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '5'. r = -4 Simplifying r = -4
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