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Simplifying 15 + (x + 1) + -7(x + 9) = 4x Reorder the terms: 15 + (1 + x) + -7(x + 9) = 4x Remove parenthesis around (1 + x) 15 + 1 + x + -7(x + 9) = 4x Reorder the terms: 15 + 1 + x + -7(9 + x) = 4x 15 + 1 + x + (9 * -7 + x * -7) = 4x 15 + 1 + x + (-63 + -7x) = 4x Reorder the terms: 15 + 1 + -63 + x + -7x = 4x Combine like terms: 15 + 1 = 16 16 + -63 + x + -7x = 4x Combine like terms: 16 + -63 = -47 -47 + x + -7x = 4x Combine like terms: x + -7x = -6x -47 + -6x = 4x Solving -47 + -6x = 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. -47 + -6x + -4x = 4x + -4x Combine like terms: -6x + -4x = -10x -47 + -10x = 4x + -4x Combine like terms: 4x + -4x = 0 -47 + -10x = 0 Add '47' to each side of the equation. -47 + 47 + -10x = 0 + 47 Combine like terms: -47 + 47 = 0 0 + -10x = 0 + 47 -10x = 0 + 47 Combine like terms: 0 + 47 = 47 -10x = 47 Divide each side by '-10'. x = -4.7 Simplifying x = -4.7
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