Question

Giúp mình với!!!

Tìm x

a) 2 ( x + 1 ) - 3 = 11

b) 60 - 5 . ( x - 3 ) = 50

c) ( 10 + 2x ) . 4^3 = 4^5

Answer 1

a) 2.(x+1) - 3 = 11

2.(x+1) = 14

x + 1 = 7

x = 6

b) 60 - 5.(x-3) = 50

5.(x-3) = 10

x-3 = 2

x = 5

c) (10+2x).4³ = 4⁵

10 + 2x = 16

2x = 6

x =3

Answer 2

\(a,2\cdot\left(x+1\right)-3\left(11\right)=0.\)

\(\left(2\cdot\left(x+1\right)-3\right)-11=0.\)

\(2x-12=2\cdot\left(x-6\right)\)

\(2\cdot\left(x-6\right)=0.\)

\(x-6=0.\)

\(x=6.\)

\(b,\left(60-5\cdot\left(x-3\right)\right)-50=0\)

\(25-5x=-5\cdot\left(x-5\right)\)

\(-5x\left(x-5\right)=0.\)

\(x-5=0\)

\(x=5\)

Câu c khó quá bn tự làm nhé.

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