1) <span>33 * 2^x-1 - 2^x+1 = 29
2^x-1 * (33-2^2) = 29
</span>2^x-1 * 29 =29
2^x-1 =1
2^x-1 = 2^0
x-1=0
x=1
2) <span> 33 * 3^x-2 + 3^x+1 = 60
</span>3^x-2 * (33+3^3) = 60
3^x-2 * 60 = 60
3^x-2 = 1
3^x-2 = 3^0
x-2 = 0
x=2
3. -42х-21-20+5х=-37х-1
2. 4/51*17/12*57/64=4*17*57/51*12*64=19/192
1.-7/8-4/5=-67/40=-1 27/40