Question

5*2-∆*5=5 then find the value of ∆​

Answer 1

1

Step-by-step explanation:

=>> 10 - 5∆ = 5

=>> -5∆ = 5 - 10

=>> -5∆ = - 5

=>> 5∆ = 5

=>> ∆ = 1

Answer 2

Answer:

3

Step-by-step explanation:

5*2-5a=5. then 15=5a,so a=3