⇔(-8)x=20-4
⇔(-8)x=16
⇔x=-2
=8(17-14)+3.25-16:2
=24+75-8
=91
=(-23+123)+(-24+124)+(-25+125)
=100+100+100
=300
C.
B.
=8.9-(1+8):9.27
=72-27
=50