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Simplifying 15s + -21t + 6u = 0 Solving 15s + -21t + 6u = 0 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '21t' to each side of the equation. 15s + -21t + 21t + 6u = 0 + 21t Combine like terms: -21t + 21t = 0 15s + 0 + 6u = 0 + 21t 15s + 6u = 0 + 21t Remove the zero: 15s + 6u = 21t Add '-6u' to each side of the equation. 15s + 6u + -6u = 21t + -6u Combine like terms: 6u + -6u = 0 15s + 0 = 21t + -6u 15s = 21t + -6u Divide each side by '15'. s = 1.4t + -0.4u Simplifying s = 1.4t + -0.4u
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