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x+x? 1.5=75
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x+x? 1.5=75? x=45?

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x+a=b,x-a=b,ax=b,x? a=b

a-x=b? Answer? x=b?

ax+b=c,ax-b=c? Axe? b=c?

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? 1? 2? 3?

Axe? b=c? ? b? ? x? Axe? ? ax=b? Answer? b? Answer? ?

? x? 1.5 10/ 15x? 2/3 times?

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x+2/3x=? 1+2/3)x=5/3x? 5/3x=75? 5/3? ? x? 75? 5/3=45? ? x=45?

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? Axe? b=c? Axe? b=c

? ax+b=c

0.5x+30=80? x? x? ? 0.5x30 0.5x50?

x 1? 0.5? x= 100?

? ax-b=c

8? 2x=28? 1? 2x28? 2? 14? x= 14 x= 14?