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calculati 100•[25-5•(x-3)+2]:4=300

Răspuns :

TediB
100 x [ 25 - 5x +15+2 ] : 4 = 300
100 x ( 25 + 17 -5x ) : 4 = 300
100 x ( 42 - 5x ) = 300 x 4
4200 - 500x=1200
-500x=4200-1200
-500x=3000
-x=6
x=-6

100*(25-5*(x-3)+2)=300*4

25-5*(x-3)+2=1200/100

25-5(x-3)=12-2

25-5(x-3)=10


25-5x+15=10

40-5x=10

40-10=5x

x=6




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