(1)
3a=30 a=10
10+2b=18 b=4
4-o=2 o=2
o+a+b=16
(2)
3r=30 r=20
20+2w=30 w=5
5-2o=3 o=1
o+rxw=101
(3)
3r=60 r=20
20+2x5b=30 b=1
5-2y=3 y=1
y+rx4b=81
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(1)
3a=30 a=10
10+2b=18 b=4
4-o=2 o=2
o+a+b=16
(2)
3r=30 r=20
20+2w=30 w=5
5-2o=3 o=1
o+rxw=101
(3)
3r=60 r=20
20+2x5b=30 b=1
5-2y=3 y=1
y+rx4b=81
thank you for participating @sammy111100 , luck ...
I don't know what luck has to do with math...
Either you're right or you made a mistake/havn't enough knowlege!