Question

5x-7x1.1=0.8-|||-(y+2.1)x3=10.8-|||-5.6x-3.2x=28.

Answer 1

(1)5ⅹ一7ⅹ+1.1=0.8
2x=一0.3
x=一0.15；
(2)一(y+2.1)X3二10.8
一(y+2.1)=3.6
y+2.1=一3.6
y=一5.7；
(3)5.6x一3.2x=28
2.4x=28
ⅹ=35/3。