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3^2.(x+14)-5^2=5.2^2
9.(x+14)-25=5.4
9.(x+14)-25=20
9.(x+14)=20+25
9.(x+14)=45
x+14=45:9
x+14=5
x=5-14
Suy ra x không có giá trị


32(x + 14) - 52 = 5 . 22
\(\Rightarrow\) 9x + 9 . 14 - 25 = 5 . 4
\(\Rightarrow\) 9x + 126 - 25 = 20
\(\Rightarrow\) 9x + 126 = 45
\(\Rightarrow\) 9x = -81
\(\Rightarrow\) x = -9

12 + ( 5 + x ) = 20 5.22 + ( x + 3 ) = 52 23 + ( x + 3 ) = 52 43 - ( x - 2 ) = 52
17 + x = 20 5.4 + x + 3 = 25 8 + x + 3 = 25 64 - x + 2 = 25
x = 20 - 17 20 + 3 + x = 25 11 + x = 25 66 - x = 25
x = 3 23 + x = 25 x = 25 - 11 x = 66 - 25
x = 25 - 23 x = 14 x = 41
x = 2
Đăng nhìu v bn :) Đáng quan ngại đây :)




3^2x(x+140-5^2=5x2^2
9x(x+14)-25=5x4
9x(x-14)-25=20
9x(x-14)=20+25=45
x-14=45:9=5
x=5+14=19
\(3^2.\left(x-14\right)-5^2=5.2^2\)
\(9.\left(x-14\right)-25=5.4\)
\(9.\left(x-14\right)-25=20\)
\(9.\left(x-14\right)=20+25\)
\(9.\left(x-14\right)=45\)
\(x-14=45:9\)
\(x-14=5\)
\(x=14+5\)
\(x=19\)

a) 22.14x . 72 = 14100
=> (2.7)2 . 14x = 14100
=> 14x = 14100 : 142
=> 14x = 1498
=> x = 98
b) 15.x + 3(x + 2) = 96
=> 15x + 3x + 6 = 96
=> 18x = 96 - 6
=> 18x = 90
=> x = 90 : 18 = 5
c) 2x + 4.2x = 5.25
=> 2x(1 + 4) = 5.25
=> 2x .5= 5.25
=> 2x = 5.25 : 5
=> 2x = 25
=> x = 5
\(a,2^2.14^x.7^2=14^{100}\)
\(\Rightarrow14^2.14^x=14^{100}\)
\(\Rightarrow14^x=14^{98}\)
\(\Rightarrow x=98\)
\(b,15.x+3\left(x+2\right)=96\)
\(\Rightarrow3\left(5x+x+2\right)=96\)
\(\Rightarrow6x+2=32\)
\(\Rightarrow6x=30\)
\(\Rightarrow x=5\)
\(c,2^x+4.2^x=5.2^5\)
\(\Rightarrow2^x\left(1+4\right)=5.2^5\)
\(\Rightarrow2^x.5=5.2^5\)
\(\Rightarrow2^x=2^5\)
\(\Rightarrow x=5\)
\(9.\left(x+14\right)-25=5.4\)
\(9.\left(x+14\right)-25=20\)
\(9.\left(x+14\right)=20+25\)
\(9.\left(x+14\right)=45\)
\(x+14=45:9\)
\(x+14=5\)\(x=5-14=-9\)
~GOOD STUDY~
3^2(x+14)-5^2=5*2^2
9 (x+14)-25 =20
9(x+14) =20+25
9(x+14) =45
(x+14) = 45/9
x+14 =5
x =5-14
x = -9