Question

Va rog spuneti-mi corect.
(-3)(2-5+3,2)

X+2x-15=0

-10+2x-x=21

Answer 1

-3(-3+3,2)=(-3)0,2=-0,6
 
3x=15⇔x=5

-10+x=21⇔x=31

Answer 2

X+2x-15=0
3x-15=0
3x=15
x=15:3
x=5

-10+2x-x=21
-10+x=21
x=21+10
x=31

(-3)(2-5+3,2)=(-3)*(0,2)=(-0,6)