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a) \(36.\left(-57\right)-57.64\)
\(=36.\left(-57\right)+\left(-57\right).64=\left(-57\right).\left(36+64\right)\)
\(=\left(-57\right).100=-5700\)
b)\(32.\left(-17\right)+\left(-18\right).17-50.13\)
\(=\left(-32\right).17+\left(-18\right).17-50.13\)
\(=17.\left(-32-18\right)-50.13=17.\left(-50\right)+\left(-50\right).13\)
\(=\left(-50\right).\left(17+13\right)=\left(-50\right).30=-150\)
c)\(-\left(-35\right)+12-|-35|-42\)
\(=35+12-35-42=12-42=-30\)
d)\(\left(-15-12\right):\left(-3\right)^2+5-13.\left(-2\right)+\left(-64\right):2^3\)
\(=-27:9+5+26-64:8=-3+5+26-8=20\)
e)\(\left(135-35\right).\left(-37\right)+37.\left(-42-58\right)=100.\left(-37\right)+37.\left(-100\right)\)
\(=\left(-100\right).37+37.\left(-100\right)=\left(-100\right).\left(37+37\right)\)
\(=\left(-100\right).74=-7400\)
Chúc em học tốt!!!!!!
\(\Rightarrow42-2x-32+6=6\\ \Rightarrow16-2x=6\\ \Rightarrow2x=10\\ \Rightarrow x=5\)
\(\Rightarrow42-2x-32+6=6\\ \Rightarrow16-2x=6\\ \Rightarrow2x=10\\ \Rightarrow x=5\)
\(42-\left(2x+32\right)+12:2=6\)
\(\Rightarrow42-\left(2x+32\right)+12=12\)
\(\Rightarrow42-\left(2x+32\right)=0\)
\(\Rightarrow2x+32=42\)
\(\Rightarrow2x=10\)
\(\Rightarrow x=5\)
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
\(42-\left(2x+32\right)+12:2=6\)
\(\Rightarrow42-\left(2x+32\right)+12=12\)
\(\Rightarrow42-\left(2x+32\right)=0\)
\(\Rightarrow2x+32=42\)
\(\Rightarrow2x=10\)
\(\Rightarrow x=5\)
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
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
\(42-\left(2x+32\right)=12:2=6\)
\(42-\left(2x+32\right)+6=6\)
\(42-\left(2x+32\right)=6-6=0\)
\(2x+32=42-0=42\)
\(2x=42-32=10\)
\(x=10:2=5\)
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