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Simplifying 28x + -7 = 21x + -70 Reorder the terms: -7 + 28x = 21x + -70 Reorder the terms: -7 + 28x = -70 + 21x Solving -7 + 28x = -70 + 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. -7 + 28x + -21x = -70 + 21x + -21x Combine like terms: 28x + -21x = 7x -7 + 7x = -70 + 21x + -21x Combine like terms: 21x + -21x = 0 -7 + 7x = -70 + 0 -7 + 7x = -70 Add '7' to each side of the equation. -7 + 7 + 7x = -70 + 7 Combine like terms: -7 + 7 = 0 0 + 7x = -70 + 7 7x = -70 + 7 Combine like terms: -70 + 7 = -63 7x = -63 Divide each side by '7'. x = -9 Simplifying x = -9
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