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Simplifying 21 + -5x = -7 + -2x Solving 21 + -5x = -7 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 21 + -5x + 2x = -7 + -2x + 2x Combine like terms: -5x + 2x = -3x 21 + -3x = -7 + -2x + 2x Combine like terms: -2x + 2x = 0 21 + -3x = -7 + 0 21 + -3x = -7 Add '-21' to each side of the equation. 21 + -21 + -3x = -7 + -21 Combine like terms: 21 + -21 = 0 0 + -3x = -7 + -21 -3x = -7 + -21 Combine like terms: -7 + -21 = -28 -3x = -28 Divide each side by '-3'. x = 9.333333333 Simplifying x = 9.333333333
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