Question

9 + 3 x [6 – 2 x (12 – a x 5)] = 15

Answer 1

3 × [6 - 2 × ( 12 - a × 5)] = 15 - 9 = 6

6 - 2 × ( 12 - a × 5) = 6 : 3 = 2

2 × ( 12 - a × 5) = 6 - 2 = 4

12 - a × 5 = 4 : 2 = 2

a × 5 = 12 - 2 = 10

a = 10 : 5

a = 2

Answer 2

Explicație pas cu pas:

ღSalutare!ღ

9+3×[6-2×(12-a×5)]=15

3×[6-2×(12-a×5)]=15-9

3×[6-2×(12-a×5)]=6

6-2×(12-a×5)=6:3

6-2×(12-a×5)=2

2×(12-a×5)=6-2

2×(12-a×5)=4

12-a×5=4:2

12-a×5=2

a×5=12-2

a×5=10

a=10:5

a=2

Succes!!;)