Question

Sa se rezolve in multimea numerelor reale ecuatia 2^x+3-2^x=28.

Answer 1

$2^{x+3}-2^x=28 \\ \\ 2^x\cdot8-2^x=28 \\ \\ 2^x\cdot7=28 \\ \\ 2^x=4 \\ \\ x=2$