"x=" quantity A;
"y=" quantity B;
"3x+2y=400;"
"2x+5y=400;"
"5y <400;y<80;"
"4y+3x=400;"
"2x=400-5y; x=200-2.5y;"
"3\u00d7(200-2.5y)+4y=400;"
"200=3.5y; y=57;"
"2x=400-5\u00d757=115; x=115\/2;x=57;"
"3\u00d757+2\u00d757=" 285 labor hours;
"2\u00d757+5\u00d757=399" machine hours;
"4\u00d757+3\u00d757=399" green paints;
"5\u00d757=285" blue paints;
"5\u00d757+10\u00d757=855" shillings;
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