Question

A) 8/4 = x/10 e C) 2x/5 =4/2


B) X+2/3=x/5 D) x-2/5 = 2+X/7

Por favor !!! Obs: / e de fração

Answer 1

A) 8/4 = x/10
4 vezes x =8x10
4X=80
80/4=20

B) X+2/3=x/5
5(x+2)=3 vezes x
5x+10=3x
5x-3x=10
2X=10
x=10/2
X=5

C) 2x/5 =4/2
2X vezes 2=5x4
4X=20
X=20/4
X=5

D) x-2/5 = 2+X/7
(X-2)7=5(2+X)
7X-14=10+5x
7x-5x=14+10
2X=24
X=24/2
X=12