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Simplifying 7 + -3x = x + 87 Reorder the terms: 7 + -3x = 87 + x Solving 7 + -3x = 87 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 7 + -3x + -1x = 87 + x + -1x Combine like terms: -3x + -1x = -4x 7 + -4x = 87 + x + -1x Combine like terms: x + -1x = 0 7 + -4x = 87 + 0 7 + -4x = 87 Add '-7' to each side of the equation. 7 + -7 + -4x = 87 + -7 Combine like terms: 7 + -7 = 0 0 + -4x = 87 + -7 -4x = 87 + -7 Combine like terms: 87 + -7 = 80 -4x = 80 Divide each side by '-4'. x = -20 Simplifying x = -20
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