Question

Afla valoarea numerica a literei ,,a'': 90-{6*a]=36 24+{8*a}=72 {63:a}+36=45 {a:4}+42=51 {7*a}+21=70

Answer 1

1) 90-(6×a)=36 =>6×a=90-36 =>6×a=54 =>
a=54÷6 => a=9
2) 24+(8×a)=72 =>8×a=72-24 =>8×a=48 => a=48÷8 =>a=6
3) (63÷a)+36=45 =>63÷a=45-36 =>63÷a=9 =>a=63÷9 =>a=7
4) (a÷4)+42=51 =>a÷4=51-42 =>a÷4=9 =>a=9×4 =>a=36
5) (7×a)+21=70 =>7×a=70-21 =>7×a=49 =>a=49÷7 =>a=7

SPER CA TEAM AJUTAT (P.S. LEAM NUMEROTAT DEOARECE NU PUTEAM SA LE DEOSEBESC CUM TREBUIE)