2x÷0.8=3.4
2.4x+3.6x=15
2.8x+3.4=10.12
3(x-2.8)=16.8
0.8×0.5=
3.2÷0.4=
2.5×8=
4.8÷0.06=
1.5×0.06=
0.52=
1.4÷7=
8×0.5÷0.5×8=
16÷x=2.5
8.4x+3x=228
1.5x-4×2.1=2.1
5(x-4.5)=40