1)(-12)*(х+6,7)=0-12х+6,7=0
-12х=-6,7
х=0,56
<span>2) (26,9-х)*8,1=0
</span>217,89-8,1х=0
8,1х=217,89
х=26,9
<span>3)45,9*(5,2+х)=0
</span>238,68+45,9х=0
45,9х=-238,68
х=-5,2
<span>4) -76,3*(х-6)=0
</span>-76,3х+45,78=0
-76,3х=-45,78
х=6
<span>5)-2,5*(5,7+х)=0
</span>-14,25+(-2,5х)=0
-2,5х=14,25
х=-5,7
<span>6)912,3+х)*10=0
</span>9123+10х=0
10х=-9123
х=-912,3