wiolettakoo wiolettakoo

06-04-2020
Mathematics

contestada

rozwiąż równania:
a. x-7=(7-x)-(14-2x)

b. x-4x+(2x+3)=6(3-x)

c. 2x+15=16(1+0,125x)
na teraz szybko plz

Respuesta :

06-04-2020

[tex]a)\\x-7=(7-x)-(14-2x)\\x-7=7x-14+2x\\x-7=-7+x\\b)\\x-4x+(2x+3)=6(3-x)\\x-4x+2x+3=18-6x\\-x+3=18-6x\\-x+6x=18-3\\5x=15 //:5\\x=3\\c)\\2x+15=16(1+0,125x)\\2x+15=16+2x\\15=16[/tex]

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