21+4x=49 2/3x×3/5=8 6x-3/2x=54 3.7-0.5x=16 2.4x-2.8=3.2 3x-5×=6.5

4X=49-21
X=28÷4
X=7
2/3X=8÷3/5
X=8×5/3×3/2
X=20
4.5X=54
X=54÷4.5
X=12
0.5X=3.7-16
X=-12.3÷0.5
X=-24.62.4X=3.2+2.8
X =6÷2.4
X=2.5
-2X=6.5
X=-6.5÷2
X=3.25