Answer:
t=1
r=1
Step-by-step explanation:
10r-4t=6 equation 1
7r +5t=12 equation 2
using equation 1 we have:
10r-4t=6
10r = 6+4t
r= (6+4t)/10 equation 3
using equation 3 in equation 2 we have:
7((6+4t)/10)) +5t=12
4.2 + 2.8t +5t =12
7.8t = 12-4.2
7.8t= 7.8
t = 7.8/7.8
so we have:
r= (6+4(1))/10
r= 10/10
