6x-5.3×2.1=1.05
x=
x=( )
45=4x-19,则x=
84-4x=24
①35+x=53
②2x- =
③0.1x+0.4x=30
④x÷6.5=1.3
⑤1.5x-3×1.2=3.9
解:设每枝钢笔的价钱是x元.