<span>1) -10а + 128 = -64а</span>
<span>-10a+64a=-128</span>
<span>54a=-128</span>
<span>a=-2.37;</span>
<span>2) </span>-5(3z+1)-11=-1
-15z-5-11=-1
15z+5+11=1
15z=-15
z=-1;
3) <span>-1у+20=-1у</span>
<span>-y+y=20</span>
<span>Нет решения;</span>
<span>4) <span>88+99в = 187+1в</span></span>
<span><span>99в-1в=187-88</span></span>
<span><span>98в=99</span></span>
<span><span>в=1;</span></span>
<span><span>5) <span>77+100х=177+1х</span></span></span>
<span><span><span>99x=100</span></span></span>
<span><span><span>x=1.01.</span></span></span>