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Simplifying 93 = 5 + -2(5r + -4) Reorder the terms: 93 = 5 + -2(-4 + 5r) 93 = 5 + (-4 * -2 + 5r * -2) 93 = 5 + (8 + -10r) Combine like terms: 5 + 8 = 13 93 = 13 + -10r Solving 93 = 13 + -10r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '10r' to each side of the equation. 93 + 10r = 13 + -10r + 10r Combine like terms: -10r + 10r = 0 93 + 10r = 13 + 0 93 + 10r = 13 Add '-93' to each side of the equation. 93 + -93 + 10r = 13 + -93 Combine like terms: 93 + -93 = 0 0 + 10r = 13 + -93 10r = 13 + -93 Combine like terms: 13 + -93 = -80 10r = -80 Divide each side by '10'. r = -8 Simplifying r = -8
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