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Simplifying 4x + -8.40 = 7x + -7.15 Reorder the terms: -8.40 + 4x = 7x + -7.15 Reorder the terms: -8.40 + 4x = -7.15 + 7x Solving -8.40 + 4x = -7.15 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. -8.40 + 4x + -7x = -7.15 + 7x + -7x Combine like terms: 4x + -7x = -3x -8.40 + -3x = -7.15 + 7x + -7x Combine like terms: 7x + -7x = 0 -8.40 + -3x = -7.15 + 0 -8.40 + -3x = -7.15 Add '8.40' to each side of the equation. -8.40 + 8.40 + -3x = -7.15 + 8.40 Combine like terms: -8.40 + 8.40 = 0.00 0.00 + -3x = -7.15 + 8.40 -3x = -7.15 + 8.40 Combine like terms: -7.15 + 8.40 = 1.25 -3x = 1.25 Divide each side by '-3'. x = -0.4166666667 Simplifying x = -0.4166666667
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