Question

aflați X din:X/15=7/3 si 2x+5/3x-7=11/2​

Answer 1

x/15 = 7/3 => 3×x = 15×7 => x = 15×7/3 = 5×7/1 => x = 35

(2x+5)/(3x-7) = 11/2 => 2×(2x+5) = 11×(3x-7) => 4x + 10 = 33x - 77 => 10+77 =33x - 4x => 87 = 29x => x = 87:29 => x = 3

Answer 2

Răspuns:

x/15=7/3

inmultim mezii cu extremii

3x=7·15=>x=105:3=>x=35

_______

(2x+5)/(3x-7)=11/2

2(2x+5)=11(3x-7)

4x+10=33x-77

10+77=33x-4x

87=29x=>x=87:29=>x=3