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3[|2x+3|+4-9]+5=4(x+9)+8x-16

Răspuns :

|2x+3| cm= 2x+3 3(2x+3+4-9)+5=4x+36+8x-16 6x-6+5=12x+20 6x-12x=20+6-5 -6x=21 -x=21/6 x=-7/2