In a practise GCSE mock paper too equations have come up and its told me to solve them. I think i have got the right answers to both of them but i wondered if you could tell me where i've gone wrong, if i have?

so the first one is: 6t + 5 = 2t + 25

I - 5 from both whole numbers.

so i now have 6t = 2t + 20

then i - 2t from both of the algebra numbers

so i now have: 4t = 20

then i divided for 4 on both sides

and the answer i got was t = 5

The second equation 2 (d + 4) = d + 15

i expanded the equation out first: 2d + 8 = d + 15

Then i - 8 from both of the whole numbers

so i now have: 2d = d + 7

then i - d from both of the algebra numbers

so i now have d = 7.

Have i gone wrong anywhere in both of them equations?

Thanks in advance