Question

aflati nr x care verifica egalitatea 6^x +6^x+1=252 Aflati x din [(3x-2)•5-1]:2+5=7

Answer 1

a) 6^x + 6^(x+1) = 252
    6^x (1 + 6) = 252
    6^x = 252:7
    6^x = 36
    x = 2
b) [(3x-2)*5-1]:2+5=7
    [(3x-2)*5-1]:2 = 2
    (3x-2)*5-1 = 4
    (3x-2)*5 = 5
    3x-2 = 1
    3x = 3
    x = 1