Question

Aflați Nr nat x din proporțiile b) x+5/11 =x/6 c) x/8=x+9/11 d)x/9=x,+8/13

Answer 1

b) (x+5)/11 =x/6
11x= 6(x+5)
11x= 6x+30
11x-6x= 30
5x=30
x= 6

c) x/8=(x+9)/11
11x= 8(x+9)
11x= 8x+72
11x-8x= 72
3x= 72
x= 26

d)x/9=(x+8)/13
13x= 9(x+8)
13x= 9x+72
13x-9x= 72
6x= 72
x= 12

Sper ca te-am ajutat!