Question

x除2-7.8=15解方程3.2x+5.7=7.3解方程0.8x-3.84=4.16解方程

Answer 1

X/2-7.8=15

X-15.6=30

X=45.6,

3.2X+5.7=7.3

3.2X=1.6

X=1/2

0.8X-3.84=4.16

0.8X=8

X=10.