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Simplifying -7x + -3(4y + 7) = -49 Reorder the terms: -7x + -3(7 + 4y) = -49 -7x + (7 * -3 + 4y * -3) = -49 -7x + (-21 + -12y) = -49 Reorder the terms: -21 + -7x + -12y = -49 Solving -21 + -7x + -12y = -49 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + -7x + 21 + -12y = -49 + 21 Reorder the terms: -21 + 21 + -7x + -12y = -49 + 21 Combine like terms: -21 + 21 = 0 0 + -7x + -12y = -49 + 21 -7x + -12y = -49 + 21 Combine like terms: -49 + 21 = -28 -7x + -12y = -28 Add '12y' to each side of the equation. -7x + -12y + 12y = -28 + 12y Combine like terms: -12y + 12y = 0 -7x + 0 = -28 + 12y -7x = -28 + 12y Divide each side by '-7'. x = 4 + -1.714285714y Simplifying x = 4 + -1.714285714y
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