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4(x+2)+2(x+1)-10 mai mic sau egal 30

Răspuns :

4x+8+2x+2-10 mai mic sau egal cu 30
4x-2x=8+2-10
2x=10
x=10:2
x=5
4(x+2)+2(x+1)-10<=30
4x+8+2x+2-10>=30
6x<=30-8-2+10
6x<=30
x<=30:6
x<=5   deci solutiile sunt(0,1,2,3,4,5,)