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Simplifying -2(5r + -4) + -4(r + 4) + -19r = 0 Reorder the terms: -2(-4 + 5r) + -4(r + 4) + -19r = 0 (-4 * -2 + 5r * -2) + -4(r + 4) + -19r = 0 (8 + -10r) + -4(r + 4) + -19r = 0 Reorder the terms: 8 + -10r + -4(4 + r) + -19r = 0 8 + -10r + (4 * -4 + r * -4) + -19r = 0 8 + -10r + (-16 + -4r) + -19r = 0 Reorder the terms: 8 + -16 + -10r + -4r + -19r = 0 Combine like terms: 8 + -16 = -8 -8 + -10r + -4r + -19r = 0 Combine like terms: -10r + -4r = -14r -8 + -14r + -19r = 0 Combine like terms: -14r + -19r = -33r -8 + -33r = 0 Solving -8 + -33r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -33r = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -33r = 0 + 8 -33r = 0 + 8 Combine like terms: 0 + 8 = 8 -33r = 8 Divide each side by '-33'. r = -0.2424242424 Simplifying r = -0.2424242424
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