a)100 -7(x- 5)=58
Tìm x: a)100 – 7 . (x – 5 ) = 58
A. 100-7{x-5}=58 B. 5.3 mũ 2 -- 32 : 4 mũ 2
\(a,\Rightarrow7\left(x-5\right)=100-58=42\\ \Rightarrow x-5=6\\ \Rightarrow x=11\\ b,=5\cdot9-2^5:2^4=45-2=43\)
100 - 7 x (X - 5 ) = 58
100 - 7 x (X - 5 ) = 58
100 - 7x + 35 = 58
7x = 135 - 58
7x = 77
x=11
100 - 7(X - 5) = 58
7(X - 5) = 42
X - 5 = 42 : 7 = 6
X = 6 + 5 = 11
tìm x thuộc Z :
a) 100-7(x-5)=58
180-5(x+1)=30
6x-5=613
a ) 100-7(x-5)=58
=> 7(x-5)=42
=.> x-5 = 6
=> x=11
180-5(x+1)=30
=> 5(x+1)=150
=> x+1=30\
=> x=29
6x-5=613
=> 6x=618
=> x=103
a) \(100-7\left(x-5\right)=58\)
\(\Leftrightarrow7\left(x-5\right)=42\)
\(\Leftrightarrow x-5=6\)
\(\Leftrightarrow x=11\)
b) \(180-5\left(x+1\right)=30\)
\(\Leftrightarrow5\left(x+1\right)=150\)
\(\Leftrightarrow x+1=30\)
\(\Leftrightarrow x=29\)
c) \(6x-5=613\)
\(\Leftrightarrow6x=618\)
\(\Leftrightarrow x=103\)
a) 100-7(x-5)=58
=> 100 - 7x + 35 = 58
=> -7x = -77
=> x = 11
180-5(x+1)=30
=> 180 - 5x - 5 = 30
=> -5x = -145
=> x = 29
6x-5=613
=> 6x = 618
=> x = 103
tìm x biết
a)565-(6x+70)=435
b)100-7(x-5)=58
\(a,565-\left(6x+70\right)=435\)
\(6x+70=565-435\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=10\)
\(b,100-7\left(x-5\right)=58\)
\(100-7x+35=58\)
\(100-7x=58-35\)
\(100-7x=23\)
\(7x=100-23\)
\(7x=77\)
\(x=11\)
a, 565-(6x+70)=435
6x+70=565-435
6x+70=130
6x=130-70
6x=60
x=60:6
x=6
b, 100-7(x-5)=58
7(x-5)=100-58
7(x-5)=42
x-5=42:7
x-5=6
x=6+5
x=11
\(a,565-\left(6x+70\right)=435\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=10\)
\(b,100-7\left(x-5\right)=58\)
\(7\left(x-5\right)=100-58\)
\(7\left(x-5\right)=42\)
\(x-5=42:7\)
\(x-5=6\)
\(x=6+5\)
\(x=11\)
100-7.(x-5)=58
100 - 7 . ( x - 5 ) = 58
7 . ( x - 5 ) = 100 - 58
7 . ( x - 5 ) = 42
( x - 5 ) = 42 : 7
( x - 5 ) = 6
x = 6 + 5
x = 11
100 - 7 x ( x - 5 ) = 58
7 x ( x - 5 ) = 100 - 58
7 x ( x - 5 ) = 42
x - 5 = 42 : 7
x - 5 = 6
x = 6 + 5
x = 11
100-7.[x-5]=58
93.[x-5]=58
x-5=58:93
x-5=0,58
x=5,58
tìm x, biết : 100-7(x-5) = 58
100 - 7 . ( x - 5 ) = 58
93 . x - 5 = 58
x - 5 =93 : 58
x - 5 = 1.6
x = 1.6 +5
x = 6.6
100-7.(x-5)=58
7.(x-5)=100-58
7.(x-5)=42
x-5=42:7
x-5=7
x=7+5
x=12
vậy x=12
100-7x(x-5)=58
7x(x-5)=100-58=42
x-5= 42:7=6
x=6+5
x=11
100-7 (X-5) = 58
100-7(x-5)=58
7(x-5)=100-58
7(x-5)=42
X-5=42:7
X-5=6
X=11
Tìm x, Biết::
a)100 - 7 x ( x - 5 ) = 58
b)5x - 206 = 2(mũ 4) x 4
a) 100-7(x-5)=58
b) 12.(x-1):3=43+23
a, 100 - 7 ( x - 5 ) = 58
7 ( x - 5 ) = 100 - 58
7 ( x - 5 ) = 42
( x - 5 ) = 42 : 7
x - 5 = 6
x = 6 + 5
x = 11
Vậy x = 11
b, 12 ( x - 1 ) : 3 = 43 + 23
12 ( x - 1 ) : 3 = 64 + 8
12 ( x - 1 ) : 3 = 72
12 ( x - 1 ) = 72 x 3
12 ( x - 1 ) = 216
( x - 1 ) = 216 : 12
x - 1 = 18
x = 18 + 1
x = 19
Vậy x = 19
bn thiếu dấu ở 7(x
b) 12.(x-1):3=43+23
12.(x-1):3=264
12.(x-1) =264.3
12.(x-1) =792
x-1 =792:12
x-1 =66
x =66+1
x =67