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Simplifying 21 + -8y = 7(3y + -6) Reorder the terms: 21 + -8y = 7(-6 + 3y) 21 + -8y = (-6 * 7 + 3y * 7) 21 + -8y = (-42 + 21y) Solving 21 + -8y = -42 + 21y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-21y' to each side of the equation. 21 + -8y + -21y = -42 + 21y + -21y Combine like terms: -8y + -21y = -29y 21 + -29y = -42 + 21y + -21y Combine like terms: 21y + -21y = 0 21 + -29y = -42 + 0 21 + -29y = -42 Add '-21' to each side of the equation. 21 + -21 + -29y = -42 + -21 Combine like terms: 21 + -21 = 0 0 + -29y = -42 + -21 -29y = -42 + -21 Combine like terms: -42 + -21 = -63 -29y = -63 Divide each side by '-29'. y = 2.172413793 Simplifying y = 2.172413793
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