Question

Rezolvați în Z:
A) 2-3(x+1)=5
B)4x+1=-19

Answer 1

A )

2 - 3 × ( X + 1 ) = 5

3 × ( X + 1 ) = 2 - 5

3 × ( X + 1 ) = ( - 3 )

X + 1 = ( - 3 ) : 3

X + 1 = ( - 1 )

X = ( - 1 ) - 1

X = ( - 2 )

B )

4 × X + 1 = ( - 19 )

4 × X = ( - 19 ) - 1

4 × X = ( - 20 )

X = ( - 20 ) : 4

X = ( - 5 )

Answer 2

a) 2-3(x+1)=5

2-(3x+3)=5

2-3x-3=5

-1-3x=5

1+3x= -5

3x= -6

x= -6/3

x= -2

b) 4x+1= -19

4x= -20

x= -20/4

x= -5