Question

Tìm số nguyên x biết:

(-13)^2.x = (-5) +(-10).(-17).x

Answer 1

( - 13 ) ² . x = ( - 5 ) + ( - 10 ) . ( - 17 ) . x

169 . x = ( - 5 ) + 170 . x

169 . x + 5 = 170 . x

5 = 170 . x - 169 . x

5 = 1 . x

x = 5 : 1

x = 5

Answer 2

169.x=(-5)+170.x
169.x-170.x=-5
x.(169-170)=-5
x.(-1)=-5
x=-5:(-1)

x=5

Answer 3

\(\left(-13\right)^2.x=\left(-5\right)+\left(-10\right).\left(-17\right).x\)

\(169x=\left(-5\right)+170x\)

\(169x-170x=\left(-5\right)\)

\(-x=\left(-5\right)\)

\(x=5\)