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
