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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: tìm x; {x-5} . 30/100 = 20x / 100 + 5

Toán Lớp 6: tìm x; {x-5} . 30/100 = 20x / 100 + 5

Comments ( 2 )

  1. (x-5).30/100=20/100+5
    30X-150=20×500
    10x=650
    x=65

  2. Giải đáp+Lời giải và giải thích chi tiết:
    $(x-5)$ .$\frac{30}{100}$ $=$ $\frac{20x}{100}$ $+ 5$
    $\frac{3(x-5)}{10}$ $=$ $\frac{x}{5}$ $+ 5$
    $\frac{3x-15}{10}$ $=$ $\frac{x}{5}$ $+ 5$
    $3x-15$ $=$ $2x$ $+ 5$
    $3x-2x$ $=$ $50+15$
    $x$ $=$ $65$

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222-9+11+12:2*14+14 = ? ( )