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Simplifying (-7) * x + -1(3) = 12 Multiply -1 * 3 -7x + -3 = 12 Reorder the terms: -3 + -7x = 12 Solving -3 + -7x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -7x = 12 + 3 Combine like terms: -3 + 3 = 0 0 + -7x = 12 + 3 -7x = 12 + 3 Combine like terms: 12 + 3 = 15 -7x = 15 Divide each side by '-7'. x = -2.142857143 Simplifying x = -2.142857143
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