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Simplifying 20 + 13q = 15q + -18 Reorder the terms: 20 + 13q = -18 + 15q Solving 20 + 13q = -18 + 15q Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-15q' to each side of the equation. 20 + 13q + -15q = -18 + 15q + -15q Combine like terms: 13q + -15q = -2q 20 + -2q = -18 + 15q + -15q Combine like terms: 15q + -15q = 0 20 + -2q = -18 + 0 20 + -2q = -18 Add '-20' to each side of the equation. 20 + -20 + -2q = -18 + -20 Combine like terms: 20 + -20 = 0 0 + -2q = -18 + -20 -2q = -18 + -20 Combine like terms: -18 + -20 = -38 -2q = -38 Divide each side by '-2'. q = 19 Simplifying q = 19
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