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Simplifying x + -7 = 3(x + -15) Reorder the terms: -7 + x = 3(x + -15) Reorder the terms: -7 + x = 3(-15 + x) -7 + x = (-15 * 3 + x * 3) -7 + x = (-45 + 3x) Solving -7 + x = -45 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. -7 + x + -3x = -45 + 3x + -3x Combine like terms: x + -3x = -2x -7 + -2x = -45 + 3x + -3x Combine like terms: 3x + -3x = 0 -7 + -2x = -45 + 0 -7 + -2x = -45 Add '7' to each side of the equation. -7 + 7 + -2x = -45 + 7 Combine like terms: -7 + 7 = 0 0 + -2x = -45 + 7 -2x = -45 + 7 Combine like terms: -45 + 7 = -38 -2x = -38 Divide each side by '-2'. x = 19 Simplifying x = 19
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