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Simplifying 4(x + 3) + 3x = 7x + 12 Reorder the terms: 4(3 + x) + 3x = 7x + 12 (3 * 4 + x * 4) + 3x = 7x + 12 (12 + 4x) + 3x = 7x + 12 Combine like terms: 4x + 3x = 7x 12 + 7x = 7x + 12 Reorder the terms: 12 + 7x = 12 + 7x Add '-12' to each side of the equation. 12 + -12 + 7x = 12 + -12 + 7x Combine like terms: 12 + -12 = 0 0 + 7x = 12 + -12 + 7x 7x = 12 + -12 + 7x Combine like terms: 12 + -12 = 0 7x = 0 + 7x 7x = 7x Add '-7x' to each side of the equation. 7x + -7x = 7x + -7x Combine like terms: 7x + -7x = 0 0 = 7x + -7x Combine like terms: 7x + -7x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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