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Simplifying 7x + -3x + 7 = 3(x + -4) + 20 Reorder the terms: 7 + 7x + -3x = 3(x + -4) + 20 Combine like terms: 7x + -3x = 4x 7 + 4x = 3(x + -4) + 20 Reorder the terms: 7 + 4x = 3(-4 + x) + 20 7 + 4x = (-4 * 3 + x * 3) + 20 7 + 4x = (-12 + 3x) + 20 Reorder the terms: 7 + 4x = -12 + 20 + 3x Combine like terms: -12 + 20 = 8 7 + 4x = 8 + 3x Solving 7 + 4x = 8 + 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 + 4x + -3x = 8 + 3x + -3x Combine like terms: 4x + -3x = 1x 7 + 1x = 8 + 3x + -3x Combine like terms: 3x + -3x = 0 7 + 1x = 8 + 0 7 + 1x = 8 Add '-7' to each side of the equation. 7 + -7 + 1x = 8 + -7 Combine like terms: 7 + -7 = 0 0 + 1x = 8 + -7 1x = 8 + -7 Combine like terms: 8 + -7 = 1 1x = 1 Divide each side by '1'. x = 1 Simplifying x = 1
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