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Simplifying 4x + -2(-1x) + -1(-3) = (-1x) + (-18) Remove parenthesis around (-1x) 4x + -2 * -1x + -1(-3) = (-1x) + (-18) Multiply -2 * -1 4x + 2x + -1(-3) = (-1x) + (-18) Multiply -1 * -3 4x + 2x + 3 = (-1x) + (-18) Reorder the terms: 3 + 4x + 2x = (-1x) + (-18) Combine like terms: 4x + 2x = 6x 3 + 6x = (-1x) + (-18) 3 + 6x = (-1x) + -18 Reorder the terms: 3 + 6x = -18 + (-1x) Solving 3 + 6x = -18 + (-1x) Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '(x)' to each side of the equation. 3 + 6x + (x) = -18 + (-1x) + (x) 3 + 6x + x = -18 + (-1x) + (x) Combine like terms: 6x + x = 7x 3 + 7x = -18 + (-1x) + (x) 3 + 7x = -18 + (-1x) + x Combine like terms: (-1x) + x = 0 3 + 7x = -18 + 0 3 + 7x = -18 Add '-3' to each side of the equation. 3 + -3 + 7x = -18 + -3 Combine like terms: 3 + -3 = 0 0 + 7x = -18 + -3 7x = -18 + -3 Combine like terms: -18 + -3 = -21 7x = -21 Divide each side by '7'. x = -3 Simplifying x = -3
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