7.2x÷2=5.75+x7.2x=2×(5.75+x)7.2x=2×5.75+2x7.2x=11.5+2x7.2x-2x=11.55.2x=11.5x=11.5÷5.2x≈2.21
7.2x÷2=5.75+x解方程7.2x÷2=5.75+x3.6x=5.75+x2.6x=5.75x=2.2115384615
