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Simplifying 28 + -7 = -4(7x + -7) Combine like terms: 28 + -7 = 21 21 = -4(7x + -7) Reorder the terms: 21 = -4(-7 + 7x) 21 = (-7 * -4 + 7x * -4) 21 = (28 + -28x) Solving 21 = 28 + -28x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28x' to each side of the equation. 21 + 28x = 28 + -28x + 28x Combine like terms: -28x + 28x = 0 21 + 28x = 28 + 0 21 + 28x = 28 Add '-21' to each side of the equation. 21 + -21 + 28x = 28 + -21 Combine like terms: 21 + -21 = 0 0 + 28x = 28 + -21 28x = 28 + -21 Combine like terms: 28 + -21 = 7 28x = 7 Divide each side by '28'. x = 0.25 Simplifying x = 0.25
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