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Simplifying 7x + -21 + -3x = 5 + x + -4 Reorder the terms: -21 + 7x + -3x = 5 + x + -4 Combine like terms: 7x + -3x = 4x -21 + 4x = 5 + x + -4 Reorder the terms: -21 + 4x = 5 + -4 + x Combine like terms: 5 + -4 = 1 -21 + 4x = 1 + x Solving -21 + 4x = 1 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -21 + 4x + -1x = 1 + x + -1x Combine like terms: 4x + -1x = 3x -21 + 3x = 1 + x + -1x Combine like terms: x + -1x = 0 -21 + 3x = 1 + 0 -21 + 3x = 1 Add '21' to each side of the equation. -21 + 21 + 3x = 1 + 21 Combine like terms: -21 + 21 = 0 0 + 3x = 1 + 21 3x = 1 + 21 Combine like terms: 1 + 21 = 22 3x = 22 Divide each side by '3'. x = 7.333333333 Simplifying x = 7.333333333
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