Question

daca b =5+5×3si a= 6×2-2×1 arata ca b este dublul lui a

Answer 1

b=5+5x3
b=5+15=20

a=6x2-2x1
a=12-2=10

2a=b
2x10=20

Answer 2

b=5+15=20
a=12-2=10
20:10=10
verificare:
10×2=20