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Simplifying E + 30 = 3E + 12 Reorder the terms: 30 + E = 3E + 12 Reorder the terms: 30 + E = 12 + 3E Solving 30 + E = 12 + 3E Solving for variable 'E'. Move all terms containing E to the left, all other terms to the right. Add '-3E' to each side of the equation. 30 + E + -3E = 12 + 3E + -3E Combine like terms: E + -3E = -2E 30 + -2E = 12 + 3E + -3E Combine like terms: 3E + -3E = 0 30 + -2E = 12 + 0 30 + -2E = 12 Add '-30' to each side of the equation. 30 + -30 + -2E = 12 + -30 Combine like terms: 30 + -30 = 0 0 + -2E = 12 + -30 -2E = 12 + -30 Combine like terms: 12 + -30 = -18 -2E = -18 Divide each side by '-2'. E = 9 Simplifying E = 9
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