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Select all of the equations below that are equivalent to:\newline91y=70-91y = 70\newlineUse properties of equality.\newline\newlineMulti-select Choices:\newline(A) 13y=70713y = \frac{70}{-7}\newline(B) 7y=7013-7y = \frac{70}{13}\newline(C) 7y=70137y = \frac{70}{-13}\newline(D) 13y=707-13y = \frac{70}{7}

Full solution

Q. Select all of the equations below that are equivalent to:\newline91y=70-91y = 70\newlineUse properties of equality.\newline\newlineMulti-select Choices:\newline(A) 13y=70713y = \frac{70}{-7}\newline(B) 7y=7013-7y = \frac{70}{13}\newline(C) 7y=70137y = \frac{70}{-13}\newline(D) 13y=707-13y = \frac{70}{7}
  1. Identify Equations: We need to identify which equations are equivalent to 91y=70–91y = 70 by using properties of equality. We will check each option by transforming the original equation and comparing it to the given choices.
  2. Check Option (A): Let's start with option (A) 13y=70713y = \frac{70}{-7}. To check if this is equivalent, we can simplify the right side of the equation by dividing 7070 by 7-7. \newline707=10\frac{70}{-7} = -10\newlineSo, the equation becomes 13y=1013y = -10. This is not equivalent to 91y=70-91y = 70 because the coefficients of yy and the constants do not match.
  3. Check Option (B): Now let's check option (B) 7y=7013-7y = \frac{70}{13}. We simplify the right side of the equation by dividing 7070 by 1313. 7013\frac{70}{13} does not simplify to an integer, and the coefficient of yy in the original equation is 91-91, not 7-7. Therefore, this equation is not equivalent to 91y=70-91y = 70.
  4. Check Option (C): Next, we check option (C) 7y=70137y = \frac{70}{-13}. We simplify the right side of the equation by dividing 7070 by 13-13.\newline7013=7013\frac{70}{-13} = -\frac{70}{13}\newlineThe equation becomes 7y=70137y = -\frac{70}{13}. This is not equivalent to 91y=70-91y = 70 because the coefficients of yy are not the same (77 vs. 91-91).
  5. Check Option (D): Finally, we check option (D) 13y=707–13y = \frac{70}{7}. We simplify the right side of the equation by dividing 7070 by 77.707=10\frac{70}{7} = 10The equation becomes 13y=10–13y = 10. To see if this is equivalent to 91y=70–91y = 70, we can multiply both sides of 13y=10–13y = 10 by 77 to see if we get the original equation.13y×7=10×7–13y \times 7 = 10 \times 791y=70–91y = 70This matches the original equation, so option (D) is equivalent to 91y=70–91y = 70.

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