Question

please answer this in full solution please....​

Answer 1

solution :

4+(-7)=2x-1

4-7=2x-1

-3+1=2x

-2=2x

-2/2=2x

-1=x

x=-1

Answer 2

$good \: \: \: morning \: \: \: \\ \\ \\ x {}^{m} \times x {}^{n} = x {}^{m + n} \\ \\ \\ \\ \\ \\ (4 \div9 ) {}^{4} \times (4 \div 9) {}^{ - 7} = (4 \div 9) {}^{2x - 1} \\ \\ \\ \\ now \: compare \: powers \: of \: \: (4 \div 9) \\ \\ \\ \\ (4 - 7) = 2x - 1 \\ \\ \\ - 3 = 2x - 1 \\ \\ \\ x = - 1$