How do you solve this simultaneous linear equation?

Question

98-T=10a

T-49=5a

What is the values for a and T and how do you get it? I've tried everything number I could plug in and got nada. Thanks for your help.

Answer 1

98-T = 10 a

T-49 = 5a

add equations to eliminate T:

49 = 15 a

a=3.3

T-49=5x3.3 or T=65.5

Answer 2

use substition and isolate one variable

T-49=5a

T=5a+49

substitute into the other equation

98 -(5a+49)=10a    

simplify this to...

49-5a=10a

49=15a

divide by 15 on both sides in order to isolate a

3.2666=a

plug that back into the second equation

T-49=5(3.26666)

T-49=16.33333

T=65.3333...