Which equation is an identity? 11 – (2v + 3) = –2v – 8 11 – (2 v + 3) = –2 v – 8 5w + 8 – w = 6w – 2(w – 4) 7m – 2 = 8m + 4 – m 7 8y + 9 = 8y – 3
5w + 8 – w = 6w – 2(w – 4)
Which equation has no solution 5v + 3 = 5v – 5 2x – 4 = 2x + 7 – x 2y + 5 – y = 2y – 3(y – 6) 7z + 9 = –7z – 6
5v + 3 = 5v – 5
ty
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3(x - 7) - x = 2x - 21
This is an identity. Simplifying the left side of the equation:
3x - 21 - x = 2x - 21
Which simplifies further to:
2x - 21 = 2x - 21
Both sides of the equation are equal, so this equation is an identity, meaning it is true for all values of x.
solve
Since both sides of the equation 3(x - 7) - x = 2x - 21 are equal for all values of x, there is no unique solution to solve for. This is an identity equation, which means all values of x are solutions.
Which of these four is correct for that equation
7
-2
infinitely many solutions
no solution