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student734

Q20,22,23

Applications of Algebraic Equations in One Unknown

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  • eric
    2019-12-28 22:24:18
    20. B=80+A, C=40+B=120+A so A+80+A+120+A=500
  • eric
    2019-12-28 22:40:04
    22. 40x+100=40×2x, where x is eva speed
  • eric
    2019-12-28 22:47:43
    23. First solve 350+x=4(280-x), where x is the weight taken to reach the 4 times goal
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