Question

Pomocy prosze!!!!!!!!


2 ¾ + x : ⅗ = 3 7/10 a to 2 : 2½-¾ : x = ⅚m

Answer 1

2 ¾ + x : ⅗ = 3 7/10
11/4+5/3x=37/10
5/3x=37/10-11/4
5/3x=148/40-110/40
5/3x=38/40 /*3/5
x=114/200=57/100=0,57

2 : 2½-¾ : x = ⅚
2:5/2-4/3x=5/6
2*2/5 - 4/3x=5/6
4/5-4/3x=5/6
-4/3x=5/6-4/5
-4/3x=25/30-24/30
-4/3x=1/30 /*3/4
x=3/120=1/40