Question

1)|у|=9 2) |х|=1.6 3|у|=5:9 4)|х+7|=10

Answer 1

1) |y|=9
y1=9 
y2=-9
2)|x|=1.6
x1=1.6; x2=-1.6
3) |y|=5/9
y1=5/9;     y2=-5/9
4) |x+7|=10
 x+7=10;       x+7=-10
x1=10-7        x2=-10-7
x1=3             x2=-17

Answer 2

за 4