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Simplifying 16r + -1(-19r) + (-14r) + -19r = -20 Remove parenthesis around (-19r) 16r + -1 * -19r + (-14r) + -19r = -20 Multiply -1 * -19 16r + 19r + (-14r) + -19r = -20 Combine like terms: 16r + 19r = 35r 35r + (-14r) + -19r = -20 Combine like terms: 35r + (-14r) = 21r 21r + -19r = -20 Combine like terms: 21r + -19r = 2r 2r = -20 Solving 2r = -20 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '2'. r = -10 Simplifying r = -10
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