Question

Решите уравнение: a) 10-3(5x-1,5)=2,5-5x

б) 2(3x-4)=5x-3(x+1)

Answer 1

2(3x-4)=5x-3(x+1)

6x-8=5x-3x-3

6x-5x-3x=-3+8

6x-2x=-5

4x=-5

x=-$frac{5}{4}=-1frac{1}{4}$

 

Answer 2

а) 10-3(5х-1,5)=2,5-5х

10-15х+4,5=2,5-5х

-15х+5х=2,5-10-4,5

10х=12

х=1,2

б) 2(3х-4)=5х-3(х+1)

6х-8=5х-3х-3

6х-5х+3х=8-3

4х=5

х=1,25