Problema 10.Am rezolvat ceva din ea ,dar du stiu rezolvarea complete.Plzzzzzzzzz help me.
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x- banii lui Andrei
- prima xi avem ; x/4
- a doua zi avem : 1/3*(x-x/4)
- a treia zi avem : 36 lei
a) x = ?
b)Ce suma a cheltiut a doua zi
Rezolvare :
a) x=x/4+1/3*(x-x/4)+36
x=x/4+1/3*3x/4+36
x=x/4+3x/12+36
x=(3x+3x+432)/12
12x=6x+432
6x=432, x=432/6, x=72 lei
b) 1/3*(x-x/4) = 1/3*3x/4 = 3x/12 =x/4 =72/4 =18 lei