Question

enumere los denominados y resuelva
a.3/10×-2/15=-4/5
halle la solución de cada ecuacion
a.x-2/9+x-7/3=-4​

Answer 1

Respuesta:

A)3x/10-2/15 = -4/5 ; m.c.m (5,10,15) = 30

30(3x/10)-30(2/15) = 30(-4/5)

90x/10 - 60/15 = -120/5

9x - 4 = -24

9x- 4+24 = -24+24

9x + 20 = 0

9x+20-20 = 0-20

9x = -20

9x/9 = -20/9

x = -20/9

B)(x-2)/9+x-7/3 = - 4 ; m.c.m ( 3,9 ) = 9

9((x-2)/9)+9(x)-9(7/3) = 3(-4)

((9x-18))/9 + 9x- 63/3 = -12

9x/9+(-18/9)+9x-7 = - 12

x + (-2) + 9x-7 = -12

x -2 + 9x-7 = -12

x +(-2-7)+9x = -12

x+(-9)+9x = -12

x -9 +9x = -12

(1+9)x-9 = -12

10x -9 = -12

10x-9+9 = -12+9

10x = -3

10x/10 = -3/10

x = -3/10

Explicación paso a paso: