Question

решите уравнение:
1)9х+(7х+5)-(2х-3)=х+47
2)3х-(8+9х)-(5х-4)=-7х

Answer 1

1)9х+(7х+5)-(2х-3)=х+47
9х+7х+5-2х+3=х+47
14х+8=х+47
14х-х=47-8
13х=39
х=39:13
х=3

Answer 2

1)9х+(7х+5)-(2х-3)=х+47
  9х+7х+5-2х+3=х+47
  9х+7х-2х-х=47-5-3
  13х=39
  х=39:13
  х=3

2)3х-(8+9х)-(5х-4)=-7х
  3х-8-9х-5х+4=-7х
  3х-9х-5х+7х=8-4
  -4х=4
  х=4:(-4)
  х=-1