Question

12-{6-[15-(2x-7)+5]-14}=7

Answer 1

Răspuns:

Explicație pas cu pas:

12-{6-[15-(2x-7)+5]-14}=7

6-[15-(2x-7)+5]-14 = 12 - 7 = 5

15-(2x-7)+5 = 6 - 14 - 5 = -13

(2x-7) = 15 + 5 + 13 = 33

2x = 33 + 7 = 40

x = 40 : 2 = 20

Answer 2

Răspuns:

Explicație pas cu pas:

12-{6-[15-(2x-7)+5]-14}=7

6-[15-(2x-7)+5]-14=12-7

6-[15-(2x-7)+5]-14=5

6-[15-(2x-7)+5]=5+14

6-[15-(2x-7)+5]=19

15-(2x-7)+5=6-19

15-(2x-7)+5=-13

15-(2x-7)=(-13)-5

15-(2x-7)=-18

2x-7=15-(-18)

2x-7=33

2x=33+7

2x=40

x=40÷2

x=20