Question

1) 3(x-7)+5x; 2) 5(4-3x)+8x; 3) (y-4)*2+10y; 4) (2y+5)*4-11y; 5) 4x+2(0,5x+3); 6) 6x-3(x-7).

Answer 1

1) 3(x-7)+5x=3x-21+5x=8x-21;
 2) 5(4-3x)+8x=20-15x+8x=20-7x;
3) (y-4)*2+10y=2y-8+10y=12y-8;
4) (2y+5)*4-11y=8y+20-11y=20-3y;
5) 4x+2(0,5x+3)=4x+x+6=5x+6;
6) 6x-3(x-7)=6x-3x+21=3x+21.