Question

a) 3x+5=-4x+19 b) 1/3x-1=1/4*(x+4/5)

Answer 1

а) 3х+5=-4х+19
3х+4х=19-5=
7х=14
х=14:7
х=2

б)1/3х-1=1/4*(х+4/5)
1/3х-1=1/4х+1/5
1/3х-1/4х=1/5+1
4/12х-3/12х=1 целая 1/5
1/12х=1 целая 1/5
х= 1 целая 1/5:1/12
х= 72/5=14,4