please reply fast it is so important
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x+30+1/2(90-x)=90
x+(90-x)/2=90-30=60
2x+90-x=60×2=120
×=120-90=30
x+(90-x)/2=90-30=60
2x+90-x=60×2=120
×=120-90=30
shilpa4196:
but why
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