X x 64 - 43 x X - X = 1200
Tìm X
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64 . x - 13 . x - x = 43
x . (64 - 13 - 1 ) = 43
x . 50 = 43
x = 43 : 50
x = \(\frac{43}{50}.\)
\(5\left(x-1\right)+3=43\)
\(5\left(x-1\right)=40\)
\(x-1=8\)
\(x=9\)
\(\left(1+2+3+...+50\right)+x=5050\)
\(\dfrac{50\left(50+1\right)}{2}+x=5050\)
\(1275+x=5050\)
\(x=3775\)
\(\left(2x+1\right)^3=64\)
\(\left(2x+1\right)^3=4^3\)
\(2x+1=4\)
\(2x=3\)
\(x=1,5\)
43 x 27 + 93 x 43 + 57 x 61 + 59 x 57
= 43 x ( 27 + 93 ) + 57 x ( 61 + 59 )
= 43 x 120 + 57 x 120
= 120 x ( 43 + 57 )
= 120 x 100
= 1200
b) 64 x 6 + 81 x 4 + 17 x 6
= 6 x ( 64 + 17 ) + 81 x 4
= 6 x 81 + 81 x 4
= 81 x ( 6 + 4 )
= 81 x 10
= 810
A) =43 x (27+93)+57*(61+59)
=43*120+57*120
=120*(43+57)
=120*100
=12000
a. 64 x 25 + 35 x 25 + 25
= 64 x 25 + 35 x 25 + 25 x 1
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2500
b. 58 x 42 + 32 x 8 + 5 x 16
c. ( 42 x 43 + 57 x 43 + 43 ) - 360 : 4
= 42 x 43 + 57 x 43 + 43 x 1 - 90
= 43 x ( 42 + 57 +1 ) - 90
= 43 x 100 - 90
= 4300 - 90
= 4210
d. 456 : 2 x 181456 : 3 - 102
Trả lời:
a,\(64\times25+35\times25+25\)
\(=25\times\left(64+35+1\right)\)
\(=25\times100\)
\(=2500\)
b,\(58\times42+32\times8+5\times16\)
\(=2436+256+80\)
\(=2772\)
c,\(\left(42\times43+57\times43+43\right)-360\div4\)
\(=43\times\left(42+57+1\right)-90\)
\(=43\times100-90\)
\(=4300-90\)
\(=4210\)
d,\(456\div2\times181456\div3-102\)
\(=228\div3\times181456-102\)
\(=76\times181456-102\)
\(=13790656-102\)
\(=13790554\)
mình trả lời ý a
64 x 25 +35 x 25 +25 x 1
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2500
64 x y - y x 13 -y = 43
y x (64-13-1)=43
y x 50 =43
y=43:50
y=43/50
64-(127-43)= x-(53-64)
=> 64-84= x- (-11)
=> -20 = x- (-11)
=> (-20)+(-11)=x
=> -31=x
=> x=-31
\(x\cdot194-x\cdot93-x\cdot1=1200\)
\(x\left(194-3-1\right)=1200\)
\(100x=1200\)
\(x=12\)
x * 194 - x* 94 - x = 1200
x* 194 - x*93 - x *1 = 1200
x* ( 194 - 93 -1 ) = 1200
x * 100 = 1200
x= 1200 : 100
x= 12
\(x\times64-43\times x-x=1200\)
\(x\times64-43\times x-x\times1=1200\)
\(x\times\left(64-43-1\right)=1200\)
\(x\times20=1200\)
\(x=1200:20\)
\(x=60\)
\(x\times64-43\times x-x=1200\)
\(\Rightarrow x\times64-43\times x-x\times1=1200\)
\(\Rightarrow x\times\left(64-43-1\right)=1200\)
\(\Rightarrow x\times20=1200\)
\(\Rightarrow x=1200\div20\)
\(\Rightarrow x=60\)