Question

supunctul c pls E URGENT
DAU COROANA​

Answer 1

Răspuns:

3[4|2x+5|+2(3x-7)+5]=5(6x+7)-12x+22

3[4|2x+5|+6x-14+5]=30x+35-12x+22

3[4|2x+5|+6x-9]=18x+57/:3

4|2x+5|+6x-9=6x+19

4|2x+5|+6x-6x=19+9

4|2x+5|=28/:4

|2x+5|=7 2x+5=+-7

2x+5=7 2x=7-5=2/:2 x=1

2x+5=-7 2x=-7-5=-12/:2 x=-6

x={-6,1}