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x÷7.2+3.8=15解方程!

x/7.2=15-3.8解方程x÷7.2=15-3.8x÷7.2=11.2x=7.2*11.2x=80.64

你好!x/7.2=5 x=36如有疑问,请追问.

x+3.8的和除以6=7.2(x+3.8)÷6=7.2x+3.8=7.2*6x+3.8=43.2(移项)x=43.2-3.8x=39.4

x÷8=7.2解方程 解:x=7.2x8 x=57.6

(x-3)除以2=7.2; x-3=7.2乘以2; x-3=14.4; x=14.4+3; x=17.4

x÷9=7.2解方程解:原方程即:x÷9=7.2x=9*7.2x=64.8把x=64.8代入原方程检验,64.8÷9=7.2

x÷7=3÷14 两边乘以142x=3 x=3÷2 x=1.5

(1)x÷(4.5*8)=7.2 x÷36=7.2 x÷36*36=7.2*36 x=259.2(2)1 5 :3 4 =x:1 2 3 4 x=1 5 *1 2 0.75x=0.10.75x÷0.75=0.1÷0.75 x=2 15 (3)x-30%x=1.92 0.7x=1.92 0.7x÷0.7=1.92÷0.7 x=226 35

3(x÷7)一6=153(x/7)=21x/7=21/3=7x=7x7=49

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