Respuesta :

musiclover10045

Finish the equation given for x:

10x +15 = 9(9)

= 10x +15 = 81

Subtract 15 from both sides:

10x = 66

Divide both sides by 10:

x = 66/10

X = 6.6

Now replace x with 6.6 in the equation for DE:

DE = 2(6.6) +3

Simplify:

DE = 13.2 + 3

DE = 16.2

x = 6.6

DE = 16.2 units