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Simplifying (2x + -3) + -9x + -4 = 2x + 12 Reorder the terms: (-3 + 2x) + -9x + -4 = 2x + 12 Remove parenthesis around (-3 + 2x) -3 + 2x + -9x + -4 = 2x + 12 Reorder the terms: -3 + -4 + 2x + -9x = 2x + 12 Combine like terms: -3 + -4 = -7 -7 + 2x + -9x = 2x + 12 Combine like terms: 2x + -9x = -7x -7 + -7x = 2x + 12 Reorder the terms: -7 + -7x = 12 + 2x Solving -7 + -7x = 12 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -7 + -7x + -2x = 12 + 2x + -2x Combine like terms: -7x + -2x = -9x -7 + -9x = 12 + 2x + -2x Combine like terms: 2x + -2x = 0 -7 + -9x = 12 + 0 -7 + -9x = 12 Add '7' to each side of the equation. -7 + 7 + -9x = 12 + 7 Combine like terms: -7 + 7 = 0 0 + -9x = 12 + 7 -9x = 12 + 7 Combine like terms: 12 + 7 = 19 -9x = 19 Divide each side by '-9'. x = -2.111111111 Simplifying x = -2.111111111
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