Question

7^x-2=4^2-x решите уравнение​

Answer 1

$7^{x-2}=4^{2-x}; Big |:4^{2-x}ne 0\\frac{7^{x-2}}{4^{2-x}}=1\\7^{x-2}cdot 4^{x-2}=1\\(7cdot 4)^{x-2}=1\\28^{x-2}=28^0\\x-2=0\\x=2$