Question

questões da fotooooo

Answer 1

Resposta:

Explicação passo a passo:

a)

31+x+x+x+x+x = 86 => 31+5x = 86 => 5x = 86-31 => 5x= 55 => x= 55/5 => X=11.

b)

x +x +x+ x+ x + 50 = 140+100+50+ x+ x+ x =>  5x+50 = 140 + 100 + 50 + 3x =>

5x - 3x= 140+100+50 -50 => 2x=240 => x=240/2 => X=120.

c) x+ x+ x+ x+ x = 500 + 100 => 5x = 600 => x=600/5 => X= 120.

d )  As bolinhas chamarei de x

2 + 0,5 + x+ x+ x+ x+ x +  = 10 + 6 + x+ x => 2,5+ 5x = 16+2x =>  5x-2x= 16-2,5 =>  3x= 13,5 => x=13,5/3 => X= 4,5.