The difference of two numbers,  a  and  b, is 21.  the difference of 5 times  a  and two times  b  is 18.  what are the values of  a  and  b? a.  4, 1b.  -19, 40c.  20, 1d.  30, 9e.  -8, -29

E.  -8, -29

Step-by-step explanation:

a-b=21

5a -2b =18

Take the first equation and solve for a by adding b to each side

a-b=21

a-b+b=21+b

a = 21+b

Now substitute a=21+b into the second equation

5a -2b =18

5(21+b) -2b =18

Distribute the 5

105 +5b-2b =18

Combine like terms

105 +3b =18

Subtract 105 from each side

105-105 +3b = 18-105

3b = -87

Divide each side by 3

3b/3 =-87/3

b = -29

if b = -29, we can substitute it into a =21+b

a = 21-29

a = -8

step-by-step explanation:

the answer is 62