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Simplifying 7x + -2(7x + -16) = -31 Reorder the terms: 7x + -2(-16 + 7x) = -31 7x + (-16 * -2 + 7x * -2) = -31 7x + (32 + -14x) = -31 Reorder the terms: 32 + 7x + -14x = -31 Combine like terms: 7x + -14x = -7x 32 + -7x = -31 Solving 32 + -7x = -31 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-32' to each side of the equation. 32 + -32 + -7x = -31 + -32 Combine like terms: 32 + -32 = 0 0 + -7x = -31 + -32 -7x = -31 + -32 Combine like terms: -31 + -32 = -63 -7x = -63 Divide each side by '-7'. x = 9 Simplifying x = 9
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