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Simplifying 2r + -7 + -4r = 4r + -7 Reorder the terms: -7 + 2r + -4r = 4r + -7 Combine like terms: 2r + -4r = -2r -7 + -2r = 4r + -7 Reorder the terms: -7 + -2r = -7 + 4r Add '7' to each side of the equation. -7 + 7 + -2r = -7 + 7 + 4r Combine like terms: -7 + 7 = 0 0 + -2r = -7 + 7 + 4r -2r = -7 + 7 + 4r Combine like terms: -7 + 7 = 0 -2r = 0 + 4r -2r = 4r Solving -2r = 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -2r + -4r = 4r + -4r Combine like terms: -2r + -4r = -6r -6r = 4r + -4r Combine like terms: 4r + -4r = 0 -6r = 0 Divide each side by '-6'. r = 0 Simplifying r = 0
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