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Simplifying 4 + r = 2r + -2x Solving 4 + r = 2r + -2x Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 4 + r + -2r = 2r + -2r + -2x Combine like terms: r + -2r = -1r 4 + -1r = 2r + -2r + -2x Combine like terms: 2r + -2r = 0 4 + -1r = 0 + -2x 4 + -1r = -2x Add '-4' to each side of the equation. 4 + -4 + -1r = -4 + -2x Combine like terms: 4 + -4 = 0 0 + -1r = -4 + -2x -1r = -4 + -2x Divide each side by '-1'. r = 4 + 2x Simplifying r = 4 + 2x
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