Hello!
6d + 7d = 39 <=>
<=> 13d = 39 <=>
<=> d = 39 : 13 <=>
<=> d = 3 => 6 × 3 + 7 × 3 = 39
Good luck! :)
Answer:
d=3
Step-by-step explanation:
13d=39
d=39/13
22500
150 x 150 will be 22500
66
18+15+18+15
1.35
I believe this is right but it could be wrong. Hope this helps! <3
