Question

Cine le rezolva ( complet , primeste coroana )
-2-(-5)
-2+(-)•(-2)
-4•(+5)-(-10)
3•(-5)-(-4):2
-25:(-5)+(-4)•(+2)
3x+5=11
2-3x= - 7
3-x = 8
2x + 7 = x-2
3x - 5 = x+1

Answer 1

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

-2+(-) x (-2) nu se poate calcula

-4(+5)-(-10)=  4x5x10 = 200

3*(-5)-(-4):2 = -15 + 4 : 2 = -15 + 2 = -13

-25:(-5)=(-4)x(+2) = 3

3x +5 = 11  => x=2

2-3x=7 =>  x = - 5 supra 3 ( - inainte de a pune supra )

3-x=8 =>  x = 8 / 3

2x+7 = x-2 => x= -9

3x-5 = x+1 =>  x=3