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Simplifying 21 = 1.4(x + -5) Reorder the terms: 21 = 1.4(-5 + x) 21 = (-5 * 1.4 + x * 1.4) 21 = (-7 + 1.4x) Solving 21 = -7 + 1.4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.4x' to each side of the equation. 21 + -1.4x = -7 + 1.4x + -1.4x Combine like terms: 1.4x + -1.4x = 0.0 21 + -1.4x = -7 + 0.0 21 + -1.4x = -7 Add '-21' to each side of the equation. 21 + -21 + -1.4x = -7 + -21 Combine like terms: 21 + -21 = 0 0 + -1.4x = -7 + -21 -1.4x = -7 + -21 Combine like terms: -7 + -21 = -28 -1.4x = -28 Divide each side by '-1.4'. x = 20 Simplifying x = 20
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