Question

7. Find x in the following:
(i) - 18×[(-7)+3]=(-18)×x+(-18)×3​

Answer 1

Answer:

X = -7

Step-by-step explanation:

by applying rule

a*m + a*n = a* (m+n)

therefore

X = -7

Answer 2

Answer:

-7

Step-by-step explanation:

-18[-4] = -18x + (-54)

=> 72 = -18x-54

=> 72+54 = -18x

=> 126 = -18x

=> 18x = -126

=> x = -126/18

=> x = -7

Alternatively,

-18[-7+3] = -18x + (-18)*3

taking -18 common from right hand side

-18[-7+3] = -18(x+3)

Now -18 can be cancelled from both sides

-7+3 = x+3

x= -7