Question

solve plese...... ............

Answer 1

$given \\ {7}^{(5x - 8)} \times {5}^{(x + 2)} = 30625 \\ now \: we \: know \: that \: 30625 \: can \: be \: factorised \\ into \: {5}^{4} \times {7}^{2} \\ so \: {7}^{(5x - 8)} \times {5}^{(x + 2)} = {5}^{4} \times {7}^{2} \\ by \: comparing \: both \: rhs \: and \: lhs \: we \: found \: that \\ 5x - 8 = 2 - - - - - 1 \\ and \: x + 2 = 4 - - - - - 2 \\ hence \: from \: 1 \: and \: 2 \: we \: found \: that \: x = 2$

Answer 2

2 is answer...........