oblicz  1)2(x+5)+3x=90 2)x+x-6=42 3)19=x+327 4)19=x-327 5) 43=3x+26       Przymując że ,," to kreska ułamkowa

2*(x+5) +3x=90 2x+10+3x=90 5x+10=90  |-10 5x= 80  |:5 x=16   x+x-6= 42 2x-6= 42  |+6 2x= 48  |:2 x= 24   1/9= x+ 3/27  |-3/27 1/9-3/27= x 1/9-1/9= x 0= x   1/9= x-3/27  |+3/27 1/9+3/27= x 1/9+1/9= x 2/9= x   4/3= 3x+2/6  |-2/6 4/3-2/6= 3x 4/3-1/3= 3x 3/3= 3x 1= 3x |:3 1/3= x

1) 2(x+5)+3x=90 2x+10+3x=90 5x=90-10 5x=80 // :5 x=16 2) x+x-6=42 2x=42+6 2x=48 x=24 3) [latex]frac{1}{9}[/latex]=x+[latex]frac{3}{27}[/latex] [latex]frac{1}{9}[/latex]=x+[latex]frac{1}{9}[/latex] [latex]frac{1}{9}-frac{1}{9}[/latex]=x 0=x 4) [latex]frac{1}{9}=x-frac{3}{27}[/latex] [latex]frac{1}{9} + frac{1}{9}[/latex] = x [latex]frac{2}{9}[/latex]=x 5) [latex]frac{4}{3}[/latex]=3x+[latex]frac{2}{6}[/latex] [latex]frac{4}{3}[/latex]-[latex]frac{2}{6}[/latex]=3x 1=3x// :3 [latex]frac{1}{3}[/latex]=x   Liczę na Naj :3