12-20. show your
homework is due tomorrow.

12.)-5

13.)-16

14)-20

15)6

16)-13

17)1

18)-13

19)15

20)-10

Step-by-step explanation:

12.)-x=2+3

x=5/-1

so,x=-5

13.)-4=(-2×8+x)/8

-4×8=-16+x

-32+16=x

so,x=-16

14)(7×4+m)/4=2

28+m=8

so,m=-20

15)4n=34-10

n=24/4

so,n=6

16)-2a=22+4

a=26/-2

so,a=-13

17)a+3=2×2

a=4-3

so,a=1

18)-133+3=10x

-130=10x

so,x=-13

19)4+1=v/3

5*3=v

so,v=15

20)1=3+r/5

now,

Take LCM,

We get,

1=(3*5+r*1)/5

now,

by moving 5 into LHS

We get,

1*5=15+r

5=15+r

by moving 15 into left hand side,

We get ,

5-15=r

so,r=-10 because when we subtract smaller from bigger we have to take the sign of bigger.

6 cm

step-by-step explanation:

∈3,600

step-by-step explanation: