(A) 45.7x+0.3x-2.4=89.6 (B) 80.1y-10.1y+4.7=81.7

A45,7x + 0,3x-2,4=89,645,7х+0,3х=89,6+2,446х=89,6+2,446х=92х=92:46х=2B80,1y-10,1y+4,7=81,780,1у-10,1у=81,7-4,770у=81,7-4,770у=77у=77:70у=1,1