Question

A) x-b+ (-49)= dla x= 5 b= -76
b)2x-xb= dla x= 4-(-2) b= -1

Answer 1

A)
x=5
b= -76
x-b+(-49)=5-(-76)+(-49)=5+76-49=32 
b)
x=4-(-2)=4+2=6
b= -1
2x-xb=2*6-6*(-1)=12+6=18

Answer 2

A) x-b+(-49)  dla x=5  b=-76
5-(-76)+(-49)=5+76-49=32
b) 2x-xb  dla x=4-(-2)=6  b=-1
2*6-6*(-1)=12+6=18