Zad 6 str 200 podręcznik nowa wersja matematyka z plusem matematyka 6 zadania d ,e,f jeśli ktoś nie ma to podaje zadania d 4(2x-3)=53 e 2( x+7)=3(2x -5) f 3(x-5)+7=x+1 4
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4(2x-3)=53
8x-12=53
8x=53+12
8x= 65 |:8
x=8,125
2(x+7)=3(2x-5)
2x+14=6x-15
-4x=-15-14
-4x=-29 |:-4
x=7,25
3(x-5)+7=x+14
3x-15-7=x+14
2x=14+15+7
2x=36
x=18