Question

Приведите подобные слагаемые:
2/5x+x;
7,5y-7y;
1/8x+3/8x-1/2x;

Answer 1

$\frac25x+x=\left(\frac25+1\right)x=1\frac25x\\\\7,5y-7y=(7,5-7)y=0,5y\\\\\frac18x+\frac38x-\frac12x=\left(\frac18+\frac38-\frac12\right)x=0$