11.) -4 = 2/5 x -- = my answer

Question

A.x = 10
B.x = -10
C.x = -1--
D.x = 1

12.) Which equation is an identity?

A. 11 - (2v + 3) = -2v - 8
B. 5w + 8 - w = 6w - 2(w - 4)--
C. 7m - 2 = 8m + 4 - m
D. 8y + 9 = 8y - 3

13.) Which equation has no solution?

A. 8 - (5v + 3) = 5v - 5
B. 3m - 6 = 5m + 7 - m
C. 3w + 4 - w = 5w - 2(w- 2)--
D. 7y + 9 = 7y - 6

14.) Solve the equation 5(z-4) - z = 4z - 20

A. 4
B. -4
C. infinity many solutions
D. no solution--

15.) 3 + 6z = 13 + 6z

A. z = -5/6
B. z = 2 2/3
C. z = infinity many solutions
D. z = no solutions --

17 . Solve the equation .
6(z - 2) +4 = 10

A. z = 2--
B. z = 3
C. z = -3
D. z = -4

18.) Solve the equation .
96 = -6(-4 - 3y)

A. y = 2
B. y = 4--
C. y = -2
D. y = -4

19.) solve the equation .
-4y + 8 = 4(2y - 2) -2(-16 + 8y)

A. y = -4
B. y = 4
C. y = -2 --
D. y = -6

Answer 1

11. let's check your choice
if x = -1, LS = -4 , RS = (2/5)(-1) ≠ LS
so Incorrect choice.

12. ok

13. your choice: 3w + 4 - w = 5w - 2(w- 2)
2w + 4 = 3w + 4
-w = 0
w = 0 , I found a solution, so
your choice: incorrect

14. 5(z-4) - z = 4z - 20
5z - 20 - z = 4z - 20
0=0
infinite number of solutions
your choice: incorrect

15. correct

17 , incorrect, substitute your choice, it does not work

18. correct

19. your choice does not satisfy the equation, so
incorrect