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

Toán Lớp 6: Tìm x : a) 10 + 2x = $4^5$ : $4^3$ b) 10x + $2^2$ . 5 = $10^2$ Giúp em nha

Toán Lớp 6: Tìm x :
a) 10 + 2x = $4^5$ : $4^3$
b) 10x + $2^2$ . 5 = $10^2$
Giúp em nha

Comments ( 2 )

  1. Giải đáp:
     $a) 10+2x=4^5:4^3$
    $⇔ 10+2x= 4^{5-3}$
    $⇔ 10+2x=4^2$
    $⇔ 10+2x=16$
    $⇔ 2x=16-10$
    $⇔ 2x=6$
    $⇔ x=6:2$
    $⇔ x=3$
    $\text{Vậy x=3}$
    $b) 10x+2².5=10²$
    $⇔ 10x+20=100$
    $⇔ 10x=100-20$
    $⇔ 10x=80$
    $⇔ x=80:10$
    $⇔ x=8$
    $\text{Vậy x=8}$
    $\text{#Best}$
     

  2. a) 10 + 2x = 4^5 : 4^3
    10 + 2x = 4^2
    10 + 2x = 16
    2x = 16 – 10
    2x = 6
    x = 6 : 2
    x = 3
    b) 10x + 2^2 . 5 = 10^2
    10x + 20 = 100
    10x = 100 – 20
    10x = 80
    x = 80 : 10
    x = 8 

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

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