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Simplifying -90 = 4x + 3(x + -2) Reorder the terms: -90 = 4x + 3(-2 + x) -90 = 4x + (-2 * 3 + x * 3) -90 = 4x + (-6 + 3x) Reorder the terms: -90 = -6 + 4x + 3x Combine like terms: 4x + 3x = 7x -90 = -6 + 7x Solving -90 = -6 + 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. -90 + -7x = -6 + 7x + -7x Combine like terms: 7x + -7x = 0 -90 + -7x = -6 + 0 -90 + -7x = -6 Add '90' to each side of the equation. -90 + 90 + -7x = -6 + 90 Combine like terms: -90 + 90 = 0 0 + -7x = -6 + 90 -7x = -6 + 90 Combine like terms: -6 + 90 = 84 -7x = 84 Divide each side by '-7'. x = -12 Simplifying x = -12
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