(x-5)+(x+5)+2x+(x÷2)=180的解
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(x-5)+(x+5)+2x+(x÷2)=180的解
(x-5)+(x+5)+2x+(x÷2)=180的解
(x-5)+(x+5)+2x+(x÷2)=180的解
(x-5)+(x+5)+2x+(x÷2)=180
2x+2x+x/2=180
9x/2=180
x=40
X=40
(x-5)+(x+5)+2x+(x÷2)=180
x-5+x+5+2x+0.5x=180
4.5x=180
x=180/4.5
x=40
2x-10+2x+10+4x+x=360
9x=360
x=40
去括号,化简得;
4X+X/2=180
9X/2=180
9X=360
X=40
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