Question

a-b+c=4 Sa se determine x stiind ca x×a-x*b=35+x*c=64

Answer 1

x*a-x*b=35+x*c

35+x*c=64 <=> x*c=64-35 <=>x*c=29

x*a-x*b=35+x*c <=> x*a-x*b+x*c=35+x*c+x*c <=>

<=> x(a-b+c)=35+2x*c

<=>x*4=35+2*29

4x=35+54

4x=89

x=89/4

Answer 2

x·a-x·b=35+x·c
35+x·c=64 daca si numai dacă x·c=64-35 daca si numai daca c·x=29
x·a-x·b=35+x·c daca si numai daca x·a-x·b+x·c=35+x·c+x·c daca si nuami daca x·(a-b+c)=35+2x·c daca si numai daca x·4=35+2·29 si 4x=35+54=89 x=89pe4