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Simplifying (-4.2) * 5 + -1(25.2) * 5 = x Multiply -4.2 * 5 -21 + -1(25.2) * 5 = x Multiply -1 * 25.2 -21 + -25.2 * 5 = x Multiply -25.2 * 5 -21 + -126 = x Combine like terms: -21 + -126 = -147 -147 = x Solving -147 = x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -147 + -1x = x + -1x Combine like terms: x + -1x = 0 -147 + -1x = 0 Add '147' to each side of the equation. -147 + 147 + -1x = 0 + 147 Combine like terms: -147 + 147 = 0 0 + -1x = 0 + 147 -1x = 0 + 147 Combine like terms: 0 + 147 = 147 -1x = 147 Divide each side by '-1'. x = -147 Simplifying x = -147
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