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ajuttoooooorrrrrr vaaaaaaa rooooogggg mult! ex 4

Ajuttoooooorrrrrr Vaaaaaaa Rooooogggg Mult Ex 4 class=

Răspuns :

2/3+1/3×(3-7x)=x

2/3+1-7/3x=x

/2+3/3-7/3x=x

5/3-7/3x=x

3×5/3-3×7/3x=3x

5-7x=3x

-7x-3x=-5

-10x=-5

x=5/10, x=1/2.............