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

Toán Lớp 6: Tìm các số nguyên x, y biết: a) 2xy + 5x =36 b) xy – x + 3y – 2 =6 cần gấp

Tháng Bảy 12, 2022 Toán học 1 Comment 0 views

Toán Lớp 6: Tìm các số nguyên x, y biết:
a) 2xy + 5x =36
b) xy – x + 3y – 2 =6
cần gấp

Comments ( 1 )

  1. hoquyly
    hoquyly
    12 Tháng Bảy, 2022 at 7:39 chiều
    Reply
    Giải đáp:
     
    Lời giải và giải thích chi tiết:
     a) 2xy + 5x = 36
    Step 1: Factor out variable x
    .x(2y + 5)=36
    Step 2: Divide both sides by 2y+5
    x(2y + 5)/2y + 5 = 36 / 2y + 5
    x = 36 / 2y+5
    Step 1: Add -5x to both sides.
    2xy+5x+−5x=36+−5x
    2xy=−5x+36
    Step 2: Divide both sides by 2x.
    2xy / 2x =  − 5 x+36/ 2x
    y = − 5 x + 36 / 2x
    b) xy – x + 3y – 2 = 6 
    Step 1: Add -3y to both sides.
    xy−x+3y−2+−3y=6+−3y
    xy−x−2=−3y+6
    Step 2: Add 2 to both sides.
    xy−x−2+2=−3y+6+2
    xy−x=−3y+8
    Step 3: Factor out variable x.
    x(y−1)=−3y+8
    Step 4: Divide both sides by y-1.
    x(y−1) / y−1=−3y+8 / y−1
    x = −3y+8 / y−1
    Step 1: Add x to both sides.
    xy−x+3y−2+x=6+x
    xy+3y−2=x+6
    Step 2: Add 2 to both sides.
    xy+3y−2+2=x+6+2
    xy+3y=x+8
    Step 3: Factor out variable y.
    y(x+3)=x+8
    Step 4: Divide both sides by x+3.
    y(x+3)/ x+3 = x+8 / x+3
    y = x+8 / x+3
    Chúc bn ho tốt

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

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