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Simplifying 7(3x) + -4 = 49 Remove parenthesis around (3x) 7 * 3x + -4 = 49 Multiply 7 * 3 21x + -4 = 49 Reorder the terms: -4 + 21x = 49 Solving -4 + 21x = 49 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 21x = 49 + 4 Combine like terms: -4 + 4 = 0 0 + 21x = 49 + 4 21x = 49 + 4 Combine like terms: 49 + 4 = 53 21x = 53 Divide each side by '21'. x = 2.523809524 Simplifying x = 2.523809524
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