Question

найдите корни уравнения 3(x-5)=x+3 1,5(x+8)=-4x+1 3/4(x+8)=2x+1

Answer 1

1)3(х-5)=х+3
3х-15=х+3
2х=18
х=18/2
х=9
2)1,5(х+8)=-4х+1
1,5х+12=-4х+1
5,5х=-11
х=-11:5,5=-(11*10)/55 сокращаем
х=-2
3) 3/4(х+8)=2х+1
3/4х+24/4=2х+1
3/4х+6=2х+1
-5/4х=-5
х=5:5/4=(5*4)/5
х=4