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Simplifying 7x + -4(4x + 3) = 42 Reorder the terms: 7x + -4(3 + 4x) = 42 7x + (3 * -4 + 4x * -4) = 42 7x + (-12 + -16x) = 42 Reorder the terms: -12 + 7x + -16x = 42 Combine like terms: 7x + -16x = -9x -12 + -9x = 42 Solving -12 + -9x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -9x = 42 + 12 Combine like terms: -12 + 12 = 0 0 + -9x = 42 + 12 -9x = 42 + 12 Combine like terms: 42 + 12 = 54 -9x = 54 Divide each side by '-9'. x = -6 Simplifying x = -6
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