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Simplifying 4(1 + x) + -9x = 7 + -5(x + 3) (1 * 4 + x * 4) + -9x = 7 + -5(x + 3) (4 + 4x) + -9x = 7 + -5(x + 3) Combine like terms: 4x + -9x = -5x 4 + -5x = 7 + -5(x + 3) Reorder the terms: 4 + -5x = 7 + -5(3 + x) 4 + -5x = 7 + (3 * -5 + x * -5) 4 + -5x = 7 + (-15 + -5x) Combine like terms: 7 + -15 = -8 4 + -5x = -8 + -5x Add '5x' to each side of the equation. 4 + -5x + 5x = -8 + -5x + 5x Combine like terms: -5x + 5x = 0 4 + 0 = -8 + -5x + 5x 4 = -8 + -5x + 5x Combine like terms: -5x + 5x = 0 4 = -8 + 0 4 = -8 Solving 4 = -8 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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