Question

Afla valuarea lui p din expresia: 2×(p+4×6-3×7)=15+6:2×3

Answer 1

2×(p+24-21)=15+3×3
2×( p+3)=24
p+3=24:2
p+3=12
p=12-3
p=9

Answer 2

2 × ( p + 4 × 6 - 3 × 7 ) = 15 + 6 : 2 × 3
2 × ( p + 24 - 21 ) = 15 + 3 × 3
2 × ( p + 24 - 21 ) = 15 + 9 
2 × ( p + 24 - 21 )  = 24 
p + 24 - 21  = 24 : 2 
p + 24 - 21  = 12 
p = 12 + 21 - 24 → metoda mersului invers 
p = 33 - 24 
p = 9