4.Решите уравнение.6x-(2x-5)=2(2x+4)а)1/6 x=18б)7x+11,9=0в)6x-0,8=3x+2,2г)5x(7x+ 7)=9. Created by Guzel00. matematika-ru

6 x=18б)7x+11,9=0в)6x-0,8=3x+2,2г)5x(7x+ 7)=9...

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4.Решите уравнение.
6x-(2x-5)=2(2x+4)а)1/6 x=18
б)7x+11,9=0
в)6x-0,8=3x+2,2
г)5x(7x+ 7)=9

Answers & Comments

AkulovAleksander 6x-(2x-5)=2(2x+4)а)1/6 x=18
6x-2x+5=4x+4
6x-2x-4x=-5+4
0x=-1(корней нет)
1/6x=18
x=18/ 1/6
x=108
б)7x+11,9=0
7x=-11,9
x=-11,9/7
x=-21,7
в)6x-0,8=3x+2,2
6x-3x=0,8+2,2
3x=3
x=1

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