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Simplifying 49s + 7rs + -21 + -3r = 0 Reorder the terms: -21 + -3r + 7rs + 49s = 0 Solving -21 + -3r + 7rs + 49s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '21' to each side of the equation. -21 + -3r + 7rs + 21 + 49s = 0 + 21 Reorder the terms: -21 + 21 + -3r + 7rs + 49s = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -3r + 7rs + 49s = 0 + 21 -3r + 7rs + 49s = 0 + 21 Combine like terms: 0 + 21 = 21 -3r + 7rs + 49s = 21 Add '-49s' to each side of the equation. -3r + 7rs + 49s + -49s = 21 + -49s Combine like terms: 49s + -49s = 0 -3r + 7rs + 0 = 21 + -49s -3r + 7rs = 21 + -49s Reorder the terms: -21 + -3r + 7rs + 49s = 21 + -49s + -21 + 49s Reorder the terms: -21 + -3r + 7rs + 49s = 21 + -21 + -49s + 49s Combine like terms: 21 + -21 = 0 -21 + -3r + 7rs + 49s = 0 + -49s + 49s -21 + -3r + 7rs + 49s = -49s + 49s Combine like terms: -49s + 49s = 0 -21 + -3r + 7rs + 49s = 0 The solution to this equation could not be determined.
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