Question

Afla necunoscuta; 232+[48x25+(540xY-80x5)x10]:100=797

Answer 1

232+[1.200+(540*y-400)*10]=797*100
1.200+(540*y-400)*10=79700-232
(540*y-400)*10=79.468-1.200
540*y-400=78.268:10
540*y=7.826,8+400
540*y=8.226,8
y=15.23

Answer 2

232+[1200+(540Y-400)x10]:100=797 /-232
[1200+(540Y-400)x10]:100=565/x100
1200+(540Y-400)x10=56500/-1200
(540Y-400)x10=55300/:10
540Y-400=5530/+400
540Y=5570/:540
Y=10,31