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5+2(2x+1)=5(x-1)si 15x5mai mic 10x+25

Răspuns :

5+2(2x+1)=5(x-1)
5+4x+2=5x-5
4x-5x=-5-7
-x=-12
x=12
15*5<10x+25
75<10x+25
-10x<-75+25
-10x<-50
x<50/10
x<5
5+2(2x+1)=(x-1)4x+7=5x5
4x+75x=5x−55x
−x+7=5
−x+7−7=−57
−x=−12
−x/−1=−12/−1
x=12

15x5=15*x5=15*(x*x*x*x*x)=15x5

10x+25=5(2x+5)