Solving two exponential equations

I want to solve these two exponential equations with two unknowns.

5021747384670633/8796093022208 - (191*exp(-609699130650934272/(622444614725399*T)))/10 - (19*exx)/5

3227532116765295/4398046511104 - (159*exp(-3013775930722772480/(5602001532528591*T)))/10 - (27*exx)/5

Plaese help.

Answer 1

[Torsten]

syms T
eqn = 5/19*(5021747384670633/8796093022208 - (191*exp(-609699130650934272/(622444614725399*T)))/10) ==...
      5/27*(3227532116765295/4398046511104 - (159*exp(-3013775930722772480/(5602001532528591*T)))/10)

eqn = 

Tnum = vpasolve(eqn)

Tnum = 

exx1 = subs(lhs(eqn),T,Tnum)

exx1 = 

129.48326876014043959603358902269

exx2 = subs(rhs(eqn),T,Tnum)

exx2 = 

129.48326876014043959603358902269

[Marsha Parmar]

thank you so much.

[Walter Roberson]

Are the two expressions intended to equal each other? Or is it a pair of simultaneous equations in which each has an implicit == 0 ?

syms T
eqn = str2sym('[5021747384670633/8796093022208 - (191*exp(-609699130650934272/(622444614725399*T)))/10 - (19*exx)/5, 3227532116765295/4398046511104 - (159*exp(-3013775930722772480/(5602001532528591*T)))/10 - (27*exx)/5]')

eqn = 

Tnum = vpasolve(eqn)

Tnum = struct with fields:
      T: -690.72238711814271539481565981433
    exx: 129.48326876014043959603358902269