Answer:
a) t=98
b) b=32
Step-by-step explanation:
a) 4t/7 -20=36r
r=1
4t/7-20=36
[tex]\frac{4t-140}{7}[/tex]=36
4t-140=252
4y=392
t=98
b) 2k/5=b/2-12
k=10
20/5=b/2-12
4=[tex]\frac{b-24}{2}[/tex]
8=b-24
b=32
