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Simplifying 7[5 + -1(-5x + -4)] = 140x + 147 Reorder the terms: 7[5 + -1(-4 + -5x)] = 140x + 147 7[5 + (-4 * -1 + -5x * -1)] = 140x + 147 7[5 + (4 + 5x)] = 140x + 147 Combine like terms: 5 + 4 = 9 7[9 + 5x] = 140x + 147 [9 * 7 + 5x * 7] = 140x + 147 [63 + 35x] = 140x + 147 Reorder the terms: 63 + 35x = 147 + 140x Solving 63 + 35x = 147 + 140x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-140x' to each side of the equation. 63 + 35x + -140x = 147 + 140x + -140x Combine like terms: 35x + -140x = -105x 63 + -105x = 147 + 140x + -140x Combine like terms: 140x + -140x = 0 63 + -105x = 147 + 0 63 + -105x = 147 Add '-63' to each side of the equation. 63 + -63 + -105x = 147 + -63 Combine like terms: 63 + -63 = 0 0 + -105x = 147 + -63 -105x = 147 + -63 Combine like terms: 147 + -63 = 84 -105x = 84 Divide each side by '-105'. x = -0.8 Simplifying x = -0.8
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