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\(2.3^x=10.3^{12}+8.27^4\)
=>\(2.3^x=10.3^{12}+8.\left(3^3\right)^4\)
=>\(2.3^x=10.3^{12}+8.3^{12}\)
=>\(2.3^x=3^{12}.\left(10+8\right)\)
=>\(2.3^x=3^{12}.18\)
=>\(2.3^x=3^{12}.3^2.2\)
=>\(2.3^x=3^{14}.2\)
=>\(3^x=3^{14}\)
=>x=14
\(\Rightarrow2.x^3=9565938\)
\(\Rightarrow x^3=9565938:2=4782969\)
\(\Rightarrow x=168.49....\)
\(\left(12x-4^3\right).8^3=4.8^4\)
\(12x-4^3=4.8^4:8^3\)
\(12x-64=4.8\)
\(12x-64=32\)
\(12x=32+64=96\)
\(x=96:12=8\)
Vậy x=8
\(b.\left(\left(4x+28\right).3+55\right):5=35\)
\(\left(4x+28\right).3+55=35\times5\)
\(\left(4x+28\right).3+55=175\)
\(\left(4x+28\right).3=175-55\)
\(\left(4x+28\right).3=120\)
\(4x+28=120:3=40\)
\(4x=40-28=12\)
\(x=12:4=3\)
Vậy x=3
\(c.720:\left(41-\left(2x-5\right)\right)=2^3.5\)
\(720:\left(41-\left(2x-5\right)\right)=40\)
\(41-\left(2x-5\right)=720:40=18\)
\(2x-5=41-18=23\)
\(2x=23+5=28\)
\(x=28:2=14\)
Vậy x=14
\(d.\left(3x-2^4\right).7^3=2.7^4\)
\(\left(3x-16\right).7^3=2.7^4\)
\(3x-16=2.7^4:7^3\)
\(3x-16=2.7=14\)
\(3x=14+16=30\)
\(x=30:3=10\)
Vậy x=10
Nhớ k cho mình nhé! Thank you!!!
\(a,[\left(8.x-12\right):4].3^3.3=3^6.6\)
\(\left(8x-12\right):4=54\)
\(8x-12=216\)
\(8x=228\)
\(x=28,5\)
\(b,41-2^{x+1}=9\)
\(2^{x+1}=41-9\)
\(2^{x+1}=32\)
\(2^{x+1}=2^5\)
\(\Rightarrow x+1=5\)
\(\Rightarrow x=4\)
3^x + 4^2 = (8 - 3)^2
=> 3^x + 16 = 5^2
=> 3^x = 25 - 16
=> 3^x = 9
Mà 9 = 3^2
=> x = 2
3x+42=(8-3)2
x = 9 nha