Respuesta :

devishri1977

Answer:

Step-by-step explanation:

3(4a + 6b) = 3*4a + 3*6b = 12a + 18b

-2(7a + b) = -2*7a + (-2)*b = -14a - 2b

[tex]\frac{5[3(4a+6b)-2(7a+b)-b]}{20}=\frac{5[12a+18b-14a-2b-b]}{20}\\\\ \frac{5[-2a+15b]}{20}=\frac{15b-2a}{4}[/tex]

x =1/4

Snuffs

X = 1/4 ?

since multiplying fractions is straight across,

1/4 * (15b -2a) would result in the simplification you got.