Question

ПОМОГИТЕ СРОЧНО!!!!
а) 6x-10,2=0
б) 5x-4,5=3x+2,5
в) 2x-(6x-5)=45
г) 6(x-1)=9,4-1,7x​

Answer 1

Ответ:

a)

$6x = 10.2 + 0 \\ 6x = 10.2 \\ x = 10.2 \div 6 \\ x = 1.7$

б)

$5x - 4.5 - 3x - 2.5 = 0 \\ 2x - 7 = 0 \\ 2x = 0 + 7 \\ 2x = 7 \\ x = 7 \div 2 \\ x =3.5$

в)

$2x - 6x + 5 = 45 \\ - 4x + 5 = 45 \\ - 4x = 45 - 5 \\ - 4x = 40 \\ x = 40 \div ( - 4) \\ x = - 10$

г)

$6x - 6 - 9.4 + 1.7x = 0 \\ 7.7x - 15.4 = 0 \\ 7.7x = 15.4 + 0 \\ 7.7x = 15.4 \\ x = 15.4 \div 7.7 = 154 \div 77 \\ x = 2$