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Simplifying -7 + 2x = -1 + -1(4 + -1x) -7 + 2x = -1 + (4 * -1 + -1x * -1) -7 + 2x = -1 + (-4 + 1x) Combine like terms: -1 + -4 = -5 -7 + 2x = -5 + 1x Solving -7 + 2x = -5 + 1x 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 + 2x + -1x = -5 + 1x + -1x Combine like terms: 2x + -1x = 1x -7 + 1x = -5 + 1x + -1x Combine like terms: 1x + -1x = 0 -7 + 1x = -5 + 0 -7 + 1x = -5 Add '7' to each side of the equation. -7 + 7 + 1x = -5 + 7 Combine like terms: -7 + 7 = 0 0 + 1x = -5 + 7 1x = -5 + 7 Combine like terms: -5 + 7 = 2 1x = 2 Divide each side by '1'. x = 2 Simplifying x = 2
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