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4*(-2)+3=-2-3
-8+3=-5
-5=-5 spelnia
2
3(x-2)-0,5(x-10)=-6
3x-6-0,5x+5=-6
2,5x=-5
x=-2
4x+3=x-3
4*(-2)+3=-2-3
-8+3=-5
-5=-5
liczba(-2) spełnia równanie
2.
3(x-2)-0,5(x-10)=-6
3x-6-0,5x+5=-6
3x-0,5x=-6+6-5
2,5x=-5
x=-2