5=2t
2t=5
t=5/2
t=2,5;
4+x=2x
x-2=4
-x= - 4
x=4;
1,8=27/y
1,8y=27
y=15
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5=2t
2t=5
t=5/2
t=2,5;
4+x=2x
x-2=4
-x= - 4
x=4;
1,8=27/y
1,8y=27
y=15