Question

Rezolvați in R ecuația
a ) (x - 3) × ( - 1 ) - ( x - 1) × 2 = 5
b ) 4 = ( x - 1 ) × ( - 2 ) - ( x + 2 )
.............
​

Answer 1

a) (x - 3)×( - 1 )-( x - 1)×2 = 5

-x+3-(2x-2)=5

-x+3-2x+=5

-3x+3=5

-3x=5-3

-3x=2

$x=-\frac{2}{3}$

b) 4 = ( x - 1 )×( - 2 )-( x + 2 )

4=-2x+2-x-2

4=-3x

$x=-\frac{4}{3}$