Question

Rezolvati in multimea numerelor reale ecuatia |2x-3|=7

Answer 1

|2x-3|=7

2x-3=7

2x-3+3=7+3

2x=7+3

2x=10

2x:2=10:2

x=10:2

x=5

2x-3=-7

2x-3+3=-7+3

2x=-7+3

2x=-(7-3)

2x=-4

2x:2=-4:2

x=-4:2

x=-2

$x_{1} = - 2 \\ \\ x_{2} = 5$

Answer 2

Răspuns:

Explicație pas cu pas:

I2x-3I=7 <=>

2x-3= 7=>2x=7+3 =>2x=10

=>x=10:2 =>x=5

-2x+3 =7 =>-2x =7-3 =>-2x=4

=> x=4:(-2) =>x=-2