0,37(х+200)-0,97х=123
0,37х+74-0,97х=123
0,37х-0,97х=123-74
-0,6х=49
х=49/-0,6
х=-81,6
<span>1) (1/9+b)^2 =1/81+2/9b+b</span>²<span>
,2) (k/2-t/5)^2=k</span>²/4-kt/5+t²/25<span>
3) (y+3 1/4)^2=y</span>²+6.5y+169/16<span>
4) (4 1/2+t)^2=81/4+9t+t</span>²