Question

12. Which equation is an identity?
A. 11 - (2v + 3) = -2v - 8
B. 5w + 8 - x = 6w - 2(w - 4)
C. 7m - 2 = 8m + 4 - m
D. 8y + 9 = 8y - 3

13. Which equation has no solution?
A. 5v + 3 = 5v - 5
B. 2x - 4 = 2x + 7 - x
C. 2y + 5 - y = 2y - 3(y - 6)
D. 7z + 9 = -7z - 6

Answer 1

12) the answer is A
11 -2v-3=-2-8
8=8

13) the answer is A
because 3 are not equal to -5

or

5v+3=5v-5
5v-5v=-5-3
0=-8 (false)

Answer 2

Answer:

12. Answer is B

13.Answer is A

step-by-step explanation:

12. A .11 -(2v +3)= -2v -8

11-2v +3= -2v-8

-2v +2v= -11-3-8

0=-22

this equation has no identity

B. 5w+8-x=6w-2(w-4)

5w-6w+2w=x-8+8

w=x

this equation has an identity

C. 7m-2=8m+4-m

7m=6+7m

0=6

this equation has no identity

D. 8y +9=8y-3

8y-8y=-3-9

0=-12

this equation has no identity

13. A. 5v+3 =5v -5

5v-5v=-5-3

0= -8

this equation has no solution

B. 2x -4=2x+7-x

2x -x=7+4

x=11

this equation has a solution

C. 2y + 5-y=2y-3(y-6)

2y+5-y=2y-3y+18

y+5=-y+18

2y= 13

y=13/2

this equation has a solution

D. 7z +9= -7z-6

14z=-6-9

14z= -15

z=-15/14

this equation has a solution