1. (2^2(a-3^2)>7^2-3^0
4(a-9)>49-1
4a-36>48
4a=48+36
4a=84
a=84:4
a=21
2. (2^43x+2^43x)*4=2^45x+8^17
(2^43x+2^43x)*4=2^45x+(2^3)^17
2^43(x+x)*2^2=2^45x+2^20
2x*2^43*2^2=2^45x+2^20
2x*2^45-x2^45=2^20
x(2*2^45-2^45)=2^20
x(2^46-2^45)=2^20
x*2^1=2^20
x*2=2^20
x=2^20:2
x=2^19
