a) 22+x=52
x=52-22
x=30
b) 2x-3=45
2x=45+3
2x=48
x=48:2
x=24
c)4x = 64
4x=43
\(\Rightarrow x=3\)
a) 22+x=52
x=52-22
x=30
b) 2x-3=45
2x=45+3
2x=48
x=48 : 2
x=24
c) \(4^x=64\)
\(4^x=4^3\)
=> x=3
\(a,22+x=52\) \(c,4^x=64\)
\(\Rightarrow x=52-22\) \(\Rightarrow4^x=4^3\)
\(\Rightarrow x=30\) \(\Rightarrow x=3\)
\(b,2x-3=45\)
\(\Rightarrow2x=45+3\)
\(\Rightarrow2x=48\)
\(\Rightarrow x=\frac{48}{2}=24\)
a x=52-22
b 2x=45+3=48x=48chia 2
x=24
c 4mux=64x=64chia4
x=16
a) 22 + x = 52 b) 2x - 3 = 45 c) 4x = 64
x = 52 - 22 2x = 45 + 3 => x = 3 vì :
x = 30 2x = 48 43 = 64 cho nên :
x = 48 : 2 x = 3
x = 24
b, 2x - 3 = 45
2x = 45 + 3
2x = 48
x = 48 : 2
x = 24
c, \(4^x=64\)
\(\Leftrightarrow4^x=4^3\)
\(\Leftrightarrow x=3\)
a) 22 + x = 50 b) 2x - 3 = 45 c) 4^x = 64
x = 50-22 2x = 45+3 64/4 = 16
x = 30 2x = 48 16/4=4
x = 48 / 2 4/4=1
x = 24 vậy phải chia cho 4, 3 lần => 64 = 4^3
