Odpowiedź:
a)-6×+8 x=4
-6×4+8
-32+8=-24
b)3x+9 x-5
3×(-5)+9
(-15)+9=-6
c)-2x² x=4
-2×4²=-2×16=-32
d)x(x-10) x=-2
-2×(-2-10)=-2×(-12)=24
e)4x-5y x=-3 y=-5
4×(-3)-5×(-5)=-12-25=-27
f)(x+8)/2 x=6
(6+8):2=14:2=7
g)5x-x2 x=-2
5×(-2)-(2)×(-2)
-10+4=-6
h) 5a(a+b) a=4 b=-1
5×4×(4-1)=20×3=60
i) -11a-4 a=-5
-11×(-5)-4=55-4=51
j)(3x-4):2 x=2
(3×2-4):2=(6-4):2=2:2=1
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