Question

4*3^х+2+5*3^х+1-6*3^х=5
Помогите решить

Answer 1

4*3^(x+2) +5*3^(x+1) -6*3^x = 5
3^x(4*3^2 +5*3 -6) = 5
3^x*35 = 5
3^x * 7 = 1
3^x = 1/7
xlg3 = -lg7
x = -lg7/lg3