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42 - (2 x X + 32) + 12 : 2 = 6
42 - (2 x X + 32) + 6 = 6
42 - (2 x X + 32) = 0
=> 2 x X + 32 = 42
2 x X = 10
X = 10 : 2
X = 5
Goodluck!!
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\(\Rightarrow42-2x-32+6=6\\ \Rightarrow16-2x=6\\ \Rightarrow2x=10\\ \Rightarrow x=5\)
\(\Rightarrow42-2x-32+6=6\\ \Rightarrow16-2x=6\\ \Rightarrow2x=10\\ \Rightarrow x=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(42-\left(2x+32\right)+12:2=6\)
\(\Rightarrow42-\left(2x+32\right)+12=12\)
\(\Rightarrow42-\left(2x+32\right)=0\)
\(\Rightarrow2x+32=42\)
\(\Rightarrow2x=10\)
\(\Rightarrow x=5\)
42-(2x+32)+12:2=6
(2x+32)+6=42-6
(2x-32)+6=36
(2x-32)=36-6
2x-32=30
2x=30+32
2x=62
x=62:2
x=31
Tk mk nha
![](https://rs.olm.vn/images/avt/0.png?1311)
\(42-\left(2x+32\right)+12:2=6\)
\(\Rightarrow42-\left(2x+32\right)+12=12\)
\(\Rightarrow42-\left(2x+32\right)=0\)
\(\Rightarrow2x+32=42\)
\(\Rightarrow2x=10\)
\(\Rightarrow x=5\)
42-(2x+32)+12:2+6
(2x+32)+6=42-6=36
2x+32=36-6=30
2x=30+32=62
x=62:2=31
tk mk nha
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42 - (2x + 32) + 12 = 6.2
42 - (2x + 32) + 12 = 12
42 - (2x + 32 ) = 12 - 12
42 - (2x + 32) = 0
2x + 32 = 42 - 0
2x + 32 = 42
2x = 42 - 32
2x = 10
=> x = 10 : 2
=> x = 5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(42-\left(2x+32\right)=12:2=6\)
\(42-\left(2x+32\right)+6=6\)
\(42-\left(2x+32\right)=6-6=0\)
\(2x+32=42-0=42\)
\(2x=42-32=10\)
\(x=10:2=5\)
42-(2x+32)+12:2=6
42-(2x+32)+6 =6
42-(2x+32) =6-6
42-(2x+32) =0
2x+32 =42-0
2x+32 =42
2x =42-32
2x =10
x =10:2
x =5
nhớ kick cho mình nha
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42-(2x+32)+12:2=6
42-2x-32+6=6
=> 42-32-2x=0
=> 10-2x=0
=>2x=10=> x=5
cái tính tổng thì theo công thức tính tổng: số đầu+số cuối)x số số hạng:2
số số hạng:(497-2):5+1=100
tổng là: 499x100:2
\(1,42-\left(2x+32\right)+12:2=6\)
\(\Rightarrow42-2x-32=0\)
\(\Rightarrow10-2x=0\)
\(\Rightarrow2x=10\Leftrightarrow x=5\)
\(2,S=2+7+12+17+...+497\)
\(\Rightarrow S=\frac{\left(497+2\right)\left[\left(497-2\right):5+1\right]}{2}\)
\(\Rightarrow S=\frac{499.100}{2}=499.50\)
\(\Rightarrow S=24950\)
![](https://rs.olm.vn/images/avt/0.png?1311)
42 - (2x + 32 )+12:2=6
42 -(2x + 32)+6=6
42-(2x +32)=6-6
42-(2x+32)=0
42-2x=0+32
42-2x=32
2x=42-32
2x=10
x=10:2
x=5
42-(2x+32)+12:2=6
42-(2x+32)+12=6.2=12
42-(2x+32)=12-12
42-(2x+32)=0
2x+32=0+42=42
2x=42-32
2x=10
x=10:2
x=5
hình như đề bài lỗi ở chỗ 2xX
42 - ( 2 . x + 32 ) + 12 : 2 = 6
42 - ( 2 . x + 32 ) + 12 = 6 . 2
42 - ( 2 . x + 32 ) + 12 = 12
42 - ( 2 . x + 32 ) = 12 - 12
42 - ( 2 . x + 32 ) = 0
2 . x + 32 = 0 + 42
2 . x + 32 = 42
2 . x = 42 - 32
2 . x = 10
x = 10 : 2
x = 5
chúc bn hok tốt ~