(4+х):8=9
(4+х)=8•9
(4+х)=72
х=72-4
х=68
(4+68):8=99=9
9=9
(m:5+3)•6=48
(m:5+3)=48:6
(m:5+3)=8
m:5=8-3
m:5=5
m=5•5
m=25
(25:5+3)•6=48
48=48
(9t-14):4=10
(9t-14)=10:4
(9t-14)=2.5
9t=14+2.5
9t=16.5
t=1.83333333
(9•1.8333333-14):4=10
10=10
56:(36:k-2)=8
(36:k-2)=56:8
(36:k-2)=7
36:k=2+7
36:k=9
k=36:9
k=4
56:(36:4-2)=8
8=8